Online LearningData Science9 Best Machine Learning Courses to Learn Online in 2022

9 Best Machine Learning Courses to Learn Online in 2022

Machine learning is the study of computer algorithms that can automatically improve their capabilities through experience. The study is part of artificial intelligence (AI.)

They can find hidden patterns in data, predict outcomes, and make decisions on our behalf – with full autonomy and speedup.

In the second decade of the 21st century, it becomes apparent that machine learning (ML) is the future of technology. Companies in every industry are utilizing it to optimize their operations.

Thus, although the subject is still developing, it’s not too early to start learning it. There are already thousands of use cases for machine learning, and even more are being developed right now, including self-driving cars, chatbots, and facial recognition software.

If you are interested in a lucrative tech career, your path is in machine learning. According to Indeed, machine learning engineers in the United States earn $151,223 on average, probably one of the country’s highest-earning jobs.

Furthermore, the career prospects are excellent. As more companies transform and use more machine learning and artificial intelligence in their businesses, they all need machine learning specialists to assist them.

Currently, it is possible to get started with machine learning by taking online courses. There are many resources online to learn machine learning, but only some are of high quality.

This article will present a list of the best machine learning courses that you can learn comfortably anywhere and anytime. I hope you enjoy it and master the subject in no time!

Things You Should Know

Q1: What are the prerequisites?

A: You need to understand programming languages. Python is an optimal choice. Though you don’t need to be an expert programmer, you should have the ability to code in Python and some of its libraries: NumPy and Pandas. You will need both for data preprocessing.

A good understanding of basic data science concepts, statistics for data science, linear algebra, and college-level calculus would be beneficial, especially if you want to drill deep into the theoretical part.

Some courses may not have these requirements. However, I still insist you have all the prerequisites because it will help you learn faster and smoother.

Q2: How should I start learning machine learning?

A: Please take a look at the prerequisites. If you lack any knowledge, take an online course on it. After completing those courses, you can pick some in this post to start your machine learning journey.

Q3: How do you pick machine learning courses?

A: I only pick paid machine learning courses that satisfy all conditions. (Free courses at the end of the article may not fulfill some of these)

  • Accessible on credible learning platforms
  • Provide excellent learning experience according to public reviews or my first-hand experiences
  • Offer a good value for money
  • Offer significantly better experience than studying from books and documentations
  • Flexibility (Able to learn on my devices, don’t have rigid pricing plans, etc.)

Affiliate Disclosure: This post from Victory Tale contains affiliate links. If you purchase any machine learning courses through these links, we will get a small commission from these platforms.

Nevertheless, we always value integrity and prioritize our audience’s interests. Therefore, you can rest assured that we will present all courses truthfully.

Best Machine Learning Courses

1. Data Science: Machine Learning and Predictions

This excellent course from UC Berkeley will drill deep into machine learning concepts, particularly regression and classification. Upon course completion, you will handily identify patterns in your data and make precise predictions.

Data Science: Machine Learning and Predictions
Data Science: Machine Learning and Predictions

Course Content

This course will focus primarily on regression and classification, which will help you create a model that offers the best predictions.

Below is what you will learn from the course:

  • Deep dive on regression, including correlation and bootstrap methods to quantify uncertainty
  • K-nearest neighbor algorithm for classification
  • How to test and optimize the efficiency of your models
  • Applications to real-world scenarios, including medical diagnosis

This course is self-paced. Thus, you can create your own schedule to complete the course. However, UC Berkeley suggests spending 4-6 hours per week for six weeks.

Auditing the entire course is free. However, if you want a complete experience, you have to pay a one-time $199 for the verified track.

Pros and Cons

Pros

  • Excellent machine learning course that focuses on predictions
  • Learn from faculty members of a top-ranked university
  • Build machine learning models without requiring complex mathematical knowledge
  • Self-paced learning
  • Manageable workload

Cons

  • Lack the comprehensiveness of other training courses. You need to purchase other courses if you want to drill deeper into advanced techniques.

2. Machine Learning with Python: from Linear Models to Deep Learning

If you want a course that includes all of our current knowledge of machine learning, you might want to enroll in this in-depth tutorial from MIT.

You need knowledge in linear algebra, calculus, and statistics to take this course.

Machine Learning with Python
Machine Learning with Python

Course Content

  • Introduction to Machine Learning
  • General machine learning concepts (Linear classifiers, regularization, gradient descent, over-fitting)
  • Linear regression
  • Recommender problems
  • Non-linear classification and kernels
  • Clustering
  • Deep learning and neural networks
  • Reinforcement learning and natural language processing
  • and many more

In essence, you will learn how to turn datasets into automated predictions of future data by utilizing machine learning.

In addition to the above content, you will complete as many as three machine learning projects, including creating an automatic review analyzer and digit recognition.

If you manage to finish all of the course videos, readings, and assignments, you will have a strong foundation in the subject and be ready to develop sophisticated models of your own.

As an instructor-led course, your schedule will be tighter than a self-paced one. MIT expects students to spend up to 10-14 hours per week.

You can audit this course for free, while the verified track, which includes graded assignments and a certificate, will cost you $300.

As this course is a part of the micromaster program, you will get an extra discount if you decide to enroll in the entire program.

Pros and Cons

Pros

  • Comprehensive curriculum: It covers all major machine learning concepts within a single course
  • Provide three real-world projects to work on
  • Informative and in-depth
  • Math-heavy. If you want to understand these concepts clearly, this course is probably the best option.

Cons

  • This course is instructor-led and demands an extremely high weekly commitment of 10-14 hours. Hence, it may not be suitable for those with busy schedules.

3. Machine Learning A-Z™: Hands-On Python & R In Data Science

This Udemy course by Kirill Eremenko, Hadelin de Ponteves, and the SuperDataScience team is a few courses that offer machine learning training for both Python and R.

Machine Learning A-Z one of the most affordable machine learning courses
Machine Learning A-Z, one of the most affordable machine learning courses

Course Content

The entire curriculum consists of 2 parts, a Python part, and an R part. Course content for both is similar. The only difference is the programming language used. If you want to learn machine learning using Python, you can skip all R’s parts with no issues.

Below is what you will learn

  • Introduction to machine learning (A brief introduction to clarify basic concepts such as the difference among machine learning, deep learning and artificial intelligence)
  • Data Preprocessing (Cleaning and dealing with missing data, encoding categorical data and feature scaling)
  • Deep dive on regression (Linear, Polynomial, Support Vector, Decision Tree and Random Forest)
  • Logistic Regression and K-nearest neighbors
  • Support Vector Machines (SVM), Decision Trees and Random Forest Classification
  • Clustering
  • Apriori (Association Rule Learning)
  • Reinforcement Learning and Natural Language Processing (NLP)
  • Deep Learning (Artificial/Convolutional Neural Networks)
  • Dimensionality reduction
  • How to choose suitable models and optimize for optimal performance

The video length of the course (including Python and R) is 44 hours. Thus, each part will be 22 hours long. After purchasing, you will have lifetime access to the content.

As one of the most popular machine learning courses on Udemy, Machine Learning A-Z™ receives 4.5/5.0 stars from more than 744,000 students.

Pros and Cons

Pros

  • One of the best online courses on machine learning for beginners
  • Well-structured and concise
  • Includes all areas of machine learning from basic regressions to deep learning
  • Good supplementary resources
  • Python and R options to choose from: You can choose to complete either of them or finish both if you are interested.
  • Always up-to-date (The instructors provide an update every 2-3 months.)
  • Self-paced hence fits those with busy schedules.

Cons

  • The instructor notes that you need only high-school mathematics for this course. I have to disagree strongly. The content is too sophisticated for most students to understand without computer science knowledge (able to code in Python or R) and basic data science. I survived because I took Python courses before.
  • Sometimes, the instructor’s voice is slightly mumbled, so it isn’t always easy to understand.

4. Datacamp

Datacamp is an online platform that teaches data science and related applications, including machine learning. If you want to learn data science innovatively anytime, anywhere, I think you should consider Datacamp.

The best thing about Datacamp is its interactive learning. You won’t learn much from boring videos. Alternatively, you can follow the text instructions and complete tons of exercises online below.

Learning with Datacamp
Learning with Datacamp

Course Content

You can choose any learning path, including

  • Machine Learning Fundamentals with Python
  • Machine Learning Fundamentals with R

Each track comprises several courses. For example, the Python option will have five classes, which will take approximately 20 hours to complete.

In total, Datacamp has as many as 92 online courses for machine learning, along with an extra 21 projects and hundreds of data-science-related courses.

Pricing

Below are Datacamp’s subscription plans: The pricing is for annual plans.

  • Standard – $12.42 per month
  • Premium – $33.25 per month

The Standard plan will enable you to access most courses on the Datacamp platform (more than 335 of them).

However, you will not be able to complete 80 data science and machine learning projects and take Oracle, Tableau, and Power BI courses included in the Premium plan.

Regarding pricing, the Standard plan is more than adequate for most students. I think Premium content is decent. The projects are not very in-depth, while their Tableau courses are too shallow. Thus, I don’t think it is worth the price unless you buy it at a discount.

I suggest trying the courses before making decisions. You can access the first chapter of every machine learning course for free after creating an account.

Pros and Cons

Pros

  • Beginner-friendly
  • User-friendly web and mobile platforms, allowing students to learn anywhere, any time.
  • Gamified learning system is addictive. Based on my experience, you will get bored much slower.
  • All-inclusive pricing. Besides machine learning, you can take other data science courses, including data analytics, data visualization with Tableau, and many more.

Cons

  • The courses are not in-depth. Students who want to drill deeper into advanced concepts and applications have to find online courses elsewhere.

5. Become a Machine Learning Engineer

This Udacity Nanodegree program is excellent for students who want to enhance their machine learning knowledge and skills beyond basic techniques.

You will learn from leading experts who have years of experience building and deploying machine learning models at tech giants like Amazon.

Unlike the above courses, this program will feature advanced algorithms and relevant techniques. Thus, you will need background knowledge in machine learning models, including supervised, unsupervised, and deep learning models (neural networks.)

If you have not taken deep learning courses, I recommend visiting my other post on deep learning courses to select the best ones.

Course Content

This program comprises four sections as follows:

1. Software Engineering Fundamentals – The first section will provide training on writing optimized and production-level code. Instructors will also drill deep into object-oriented programming and how to integrate it into machine learning models.

2. Machine Learning in Production – The second section will explain how to deploy machine learning models using Amazon SageMaker, one of the most popular enterprise-level machine learning platforms.

3. Machine Learning Case Studies – The third section will focus on case studies. You will apply machine learning techniques to provide solutions for real-world tasks.

4. Capstone – This final section is essentially the project. You will provide a comprehensive solution for real-world tasks from scratch. You will perform data exploration, feature extraction, model building, and finally generate actionable insights.

All sections (except the last one, which is a project in itself) will be equipped with learning resources, such as quizzes, assignments, and projects that you can practice to improve your skills.

Regarding projects, you will perform real-world tasks that you can develop further upon, such as building a plagiarism detector or deploying a sentiment analysis model.

Compared to other machine learning courses, Udacity offers much better student support, which includes the following:

Mentor Support – You can send an email to ask your mentor any questions related to the program. This support would be highly beneficial if you don’t understand some concepts or get stuck in any coding challenges.

According to Udacity, most students receive a reply within an hour, which is very fast. Hence, you can rest assured that experts are always accessible. You don’t need to be frustrated waiting endlessly for someone to reply like typical online courses again.

Project Reviews – You can submit your projects for experts to review. After reviewing your project, they will provide personalized feedback, tips & tricks, and best practices that you can implement to improve it.

The best thing is that Udacity does not limit the number of submissions. Thus, you can submit your project anytime you make changes to your model.

Most students receive a response in slightly more than an hour, creating a speedy feedback loop that you can benefit significantly from.

Career Services – Upon program completion, Udacity’s team will review your resume, cover letter, LinkedIn Profile, and Github portfolio to ensure that you are ready for job applications.

Udacity suggests spending 10 hours per week on the program, and you will complete it in 3 months. However, as the program is self-paced, you can freely adjust your learning according to your changing schedule.

This means you can take more time than the suggested three months. However, the drawback is that you will need to pay more tuition, as Udacity uses the subscription model (see below.)

The tuition for this program is $399 per month. Alternatively, you can pay for three months at once and receive a 30% discount so that you will pay only $279 per month.

Nevertheless, Udacity frequently offers discounts and financial support (the latter is accessible after creating a free account.) These excellent offers will reduce the tuition by up to 75%. Thus, you might pay only $100 for the program or even lower.

Some prospective students wonder whether Udacity’s Nanodegree program is worth the price. I am confident it is.

The support you will receive alone justifies the price. Unlimited expert access saves your valuable time and eliminates any frustration from your learning, not to mention its well-structured curriculum that will help you gain in-depth knowledge.

Pros and Cons

Pros

  • Best machine learning course for experienced students who want to master machine learning
  • Learn from leading industry experts
  • Cover practical machine learning skills, including Amazon SageMaker and model testing
  • In-depth and innovative lessons
  • Practical exercises and projects
  • Learn at your own pace
  • Excellent support from experts who are accessible at any time.
  • All Udacity programs are well-maintained. Thus, outdated content is rare.

Cons

  • Costlier than most other alternatives

6. Machine Learning by Andrew Ng

This Coursera course from Stanford University is unarguably one of the best machine learning courses available online.

You will learn from Andrew Ng, a Stanford professor who is a leading researcher in machine learning and artificial intelligence and a co-founder of Coursera.

A Coursera course by Andrew Ng - one of the best machine learning courses
Machine Learning by Andrew Ng

Course Content

Below is what you will learn from this course.

  • Review of linear algebra concepts
  • Linear regression with single and multiple variables (Short tutorial to Octave and MATLAB included)
  • Logistic regression and regularization
  • Neural networks (Representation and Learning)
  • Best practices for machine learning applications
  • Support Vector Machines (SVMs), a machine learning algorithm for classification
  • Unsupervised learning (K-means clustering and principal component analysis)
  • Anomaly detection and building recommender systems
  • Machine learning for large data sets

At the end of the course, you will apply the machine learning concepts you have learned throughout the curriculum to build a photo OCR that can recognize elements such as numbers and words in images.

You should spend approximately 60 hours on the course. Auditing the entire course is free. However, you might want to pay $79 for complete access, so the instructor will grade your assignments and send you a certificate upon course completion.

Pros and Cons

Pros

  • Learn from a leading researcher in machine learning
  • Cover all major concepts, which are a solid foundation for those who want to progress to deeper topics such as deep learning or reinforcement learning.
  • Well-structured Curriculum
  • Clear explanations
  • Free auditing
  • Overall, an excellent course for every beginner to test the waters.

Cons

  • The course content is broad and not in-depth. All the courses are designed for beginners. Still, some reviewers pointed out that it is oversimplified. If you already understand some of the basics, it may be better to consider other machine learning courses elsewhere.

7. Machine Learning Specialization

For those who completed Andrew Ng’s course and would like to gain more hands-on experience in machine learning, the University of Washington‘s short specialization is a perfect follow-up.

This course will focus primarily on case studies. You will learn how to apply machine learning techniques by using Python. Thus, prepare to code extensively in this course.

Machine Learning Specialization by University of Washington - one of the machine learning courses online
Machine Learning Specialization by the University of Washington

Course Content

There are four minor courses in this specialization as follows.

1. Machine Learning Foundations – The first course will introduce you to machine learning tools that fit specific tasks and provide a brief overview of later courses.

2. Regression – You will start with the simplest machine learning model: Regression. You will use different types of regression models to predict house prices. The instructor will explain features, techniques, and how to implement them in Python.

3. Classification – This course will teach you about one of the most popular machine learning applications. You will create classifiers that can analyze sentiment and predict loan defaults by utilizing logistic regression, decision trees, and many more.

4. Clustering & Retrieval – The last course will guide you through machine learning algorithms that can create recommender systems (you have seen it on Amazon when you view any product.) You will learn many concepts and techniques here, including K-nearest neighbors, MapReduce, and many more.

The university suggests that you spend 3 hours a week for seven months to complete the entire specialization.

Regarding pricing, you need to pay $49 per month to access the entire course. Alternatively, you can audit the curriculum for free, albeit with no graded assignments and completion certificates.

Since the entire specialization has had no updates since 2016, the course materials used to complete projects are outdated. Hence, I suggest you stick to free auditing.

Pros and Cons

Pros

  • The case study approach is engaging. The course will not focus on boring theories but will touch on machine learning tasks you are already familiar with.
  • The instructor will provide you with optional content for every module. This is in-depth knowledge that you can further study if you wish.
  • Well-structured Curriculum
  • Feature numerous real-life examples
  • Clear explanations
  • Free auditing

Cons

  • All course materials are outdated. Thus, you can use them to work on projects anymore.

8. IBM Machine Learning Professional Certificate

IBM Machine Learning is an online comprehensive machine learning course taught by IBM experts. You will start from the beginning and proceed step-by-step to more advanced content.

**Those who want to take this course should have a solid background in mathematics, including statistics, calculus, and linear algebra. **

IBM Machine Learning Professional Certificate
IBM Machine Learning Professional Certificate

Course Content

This specialization comprises six minor courses as follows.

1. Exploratory Data Analysis for Machine Learning – This first course will review the data analysis knowledge necessary for machine learning.

You will retrieve data from various databases such as SQL and NoSQL and clean any issues and problems associated with them.

2. Regression – You will get started with supervised learning by training linear regression models to predict various outcomes. Later on, you will learn several techniques and best practices that can improve your results.

3. Classification – You will move toward logistic regression models, decision trees, and many more. Your task here is to train them to classify outcomes.

The instructor will also guide you through best practices and supplementary techniques, including train and test splits and the handling of unbalanced classes dataset.

4. Unsupervised Learning – You will learn about machine learning algorithms that allow your models to find insights from datasets without the specific target variable. Your instructor will also explain clustering and its problems in detail.

5. Deep Learning and Reinforcement Learning – IBM instructors will introduce you to these two advanced machine learning topics. You will understand their theoretical relationship to neural networks and real-world applications.

6.Specialized Models: Time Series and Survival Analysis – This final course will integrate machine learning with the time series model. You will understand how to adapt your machine learning models to be suitable for making predictions on datasets with a time component.

IBM suggests spending 3 hours per week for six months to complete the course.

Regarding pricing, you can access the entire specialization at $39 per month. Alternatively, you can choose to audit it for free.

Pros and Cons

Pros

  • Well-structured curriculum
  • Cover all aspects of machine learning
  • Clear and detailed explanations for most lessons
  • Provide theoretical explanations of all the main machine learning algorithms, best for those with a Mathematics background
  • Receive a digital badge from IBM apart from a certificate

Cons

  • Several reviewers noted that the explanations could be better (this drawback only applies to the first course of the specialization.)

Coursera Plus

If you want to enroll in two or more courses on Coursera, I suggest you subscribe to Coursera Plus.

Coursera Plus - one of the best ways to reduce course fees from machine learning courses
Coursera Plus

At $399 per year ($33.25 per month,) you will get access to more than 3,000 courses for 1 year. In other words, you can enroll in any course on Coursera at no extra cost. You can access all courses for one year, which is beneficial for those with a tight schedule.

Apart from more courses and flexibility, the monthly payment is considerably lower than enrolling in each course one by one, costing $39-$79 per month.

You can try Coursera Plus for free for 14 days

9. Machine Learning by Columbia University (Archived)

As of July 2021, this course is now archived. If you are interested, you will need to wait until the university announces future dates.

This edX course from Columbia University is another solid option to consider for those who seek a comprehensive tutorial for machine learning. You will learn most of the machine learning concepts in one go (deep learning excluded.)

You should understand the math indicated in the prerequisites (see above) before enrolling.

Machine Learning course by Columbia University
Machine Learning course by Columbia University

Course Content

The course comprises two parts as follows:

The first part will discuss supervised learning, including regression and classification. The instructor will explain each technique and algorithm, such as linear/logistic regression, support vector machines, and classifiers, in detail.

The second part will tackle unsupervised learning and go in-depth on its three significant fundamental problems: data clustering, matrix factorization, and sequential models.

In each part, you will learn machine learning from both probabilistic versus non-probabilistic viewpoints, along with techniques to optimize algorithms for improved results. In this part, you will learn to build recommendation engines as well.

Similar to Coursera’s online courses for machine learning, you can audit this course for free. However, if you want a certificate and feedback on your assignments, you have to pay a one-time $249.

To complete the entire course, you will have to spend 8-10 hours a week for 12 weeks.

Pros and Cons

Pros

  • Clear and detailed explanations of the math behind all machine learning algorithms
  • Well-structured curriculum
  • Informative and in-depth lessons
  • Free auditing

Cons

  • Unlike most edX courses, this course is not self-paced but instructor-led. Thus, you will have a fixed course schedule. Late submission of assignments may hinder students from receiving a certificate
  • High weekly commitment.

Applied Machine Learning Courses

Unlike courses that I have recommended above, these courses are applied machine learning courses for specific industries, such as Financial Engineering, Management, and many more.

Not all these courses are for beginners. You may need prior machine learning skills.

Machine Learning and FinanceAn excellent program on edX by the New York University. You will learn how to apply machine learning to the financial industry, such as creating better predictions for the stock price.

Auditing the course is free. A complete experience will cost $1,438.

Fintech: AI & Machine Learning in the Financial Industry – A course by UT Austin to educate learners on how to apply machine learning to fintech areas, such as crowdfunding, Robo-advising and many more

This one-time pricing is $850.

By the way, if you are interested in learning to use machine learning in Finance, I suggest you read my article “AI in Finance course.”

Tiny Machine Learning – This course by Harvard provides insights into applying machine learning knowledge to small devices. You will design, build and deploy your tiny machine learning on your own.

You are free to audit the course, while the verified track, which includes instructor support, graded assignments, and a certificate, costs $537.

Quantum Machine Learning – A course from the University of Toronto that foresees how we will use quantum computers with machine learning

The course is free to audit, while the entire course costs $49.

Bayesian Machine Learning in Python: A/B Testing – Those in the marketing space will be familiar with A/B testing, which allows them to find landing pages or Facebook Ads that perform best. This course will provide insights into how it works and how to improve performance even further.

You have to buy this Udemy course to access all of its content.

Free Machine Learning Courses

Below are free machine learning courses you can take online.

Introduction to Machine Learning – A free course by Udacity. You will learn all the basic concepts of machine learning, starting with Naive Bayes and clustering.

Elements of AI – Supported by the Finnish government, Elements of AI teaches learners basic knowledge in machine learning and AI (Artificial Intelligence.)

Edureka Free Machine Learning Tutorial – Edureka is a platform that offers live machine learning classes. However, the team allows you to access parts of their content for free.

Exclusive: Lambda School

If you

  • Live in the US
  • Want to learn both data science and machine learning from the very beginning
  • Are interested in data-science-related careers such as data scientist, data analyst and machine learning engineer

your best bet is the Lambda School.

Lambda School
Lambda School

Lambda School provides an online Machine Learning Bootcamp where you will learn live online with experts for 6 to 12 months.

If you enroll full-time, you will spend 7 hours daily from Monday to Friday training with experts. Thus, this program will be super intense, but you will master data science and machine learning in no time.

You don’t need any prerequisites to enroll in the program, as you will learn all the basics, including Python, linear algebra, and machine learning.

After graduation, Lambda School will help you search for jobs. Thus, you can be confident they won’t leave you alone applying for jobs.

The best thing is you don’t need to pay upfront (thus, no use for student loans). The tuition is $0. You will pay 17% of your salary only if you make more than $50,000 per year from your new job related to the knowledge you learned from Lambda School (data science and machine learning.)

The income share agreement will last for 24 months or end immediately if your payment to Lambda reaches $30,000.

For example, suppose your new job is a data scientist, and you earn $70,000 per year. you will have to pay Lambda School 11,900 x 2 = $23,800 over 2 years.

However, if you are a machine learning specialist and earn $150,000 a year, you will have to pay Lambda School $30,000. However, the contract will terminate faster, as your payment has already hit the ceiling.

In other words, how much you pay will depend on your compensation, but this will not exceed $30,000.

Furthermore, if you have financial difficulties, you can contact Lambda School for assistance.

Lambda School lets you try the program for 1 month. If you don’t want to continue, you can cancel the enrollment without any obligations.

International learners can also enroll in Lambda School’s program if they are interested. However, they have to pay $15,000 upfront as tuition. The income share agreement will not apply to them.

What Should I Learn After Machine Learning?

The optimal option is to learn deep learning. You can learn Pytorch and Tensorflow to train your artificial neural network or explore reinforcement learning, natural language processing, and computer vision.

Once you complete all of this, I think you will be done with machine learning training. You can then start your machine learning project or submit your application for tech jobs.

Pun Anansakunwat
Founder of Victory Tale, a multipotentialite who has a particular interest in technology. He loves to spend time testing new products and learning interesting topics to broaden his insights. After graduating from Columbia University in 2014, he makes a living by being a stock market investor, a private tutor, a writer of three published books, and finally a website owner.

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