In addition to classes hosted by colleges, there are several online platforms that deliver course material for independent learners to work at their own pace. Each platform addresses different niches and levels of expertise. Below we have provided a sampling of courses from five learning platforms -- Coursera, edX, Udemy, Udacity, and Khan Academy -- and have organized them by area of interest. Keep in mind that some courses are school-sponsored, such as courses available from Harvard on edX, while others are not, such as those available on Udemy. You will want to explore each platform to see the breadth of offerings. 

Coursera: This platform works with universities and other organizations to offer online courses, specializations, and degrees in a variety of subjects, such as engineering, data science, machine learning, mathematics, business, computer science, digital marketing, humanities, medicine, biology, social sciences, and others. Of interest to many students is a new class offered by John Hopkins on the coronavirus pandemic and how it can be combated through epidemiology.

edX: Created initially by MIT and Harvard, edX now hosts classes from more than 140 schools, nonprofit organizations, and corporations. edX classes are delivered in weekly learning sequences.

Udemy: Students take courses on Udemy largely to improve job-related skills. Some courses even generate credit toward technical certification. 

Udacity: While it originally focused on offering university-style courses, Udacity now focuses more on vocational courses for professionals. They have begun to offer bootcamps and certifications specifically geared toward STEM careers.

Khan Academy: Many students use Khan Academy, which delivers content through instructional videos and offers practice exercises and personalized learning. They offer courses in math, science, computer programming, history, art history, economics, and more.personalized learning. They offer courses in math, science, computer programming, history, art history, economics, and more.

MATH

Calculus Single Variable: Function – University of Pennsylvania

Calculus Single Variable: Integration – University of Pennsylvania

Introduction to Calculus – University of Sydney

Probability and Statistics – University of London

Linear Algebra I: Linear Equations

Master Number Theory: The Secrets of Numbers

Discrete Mathematics

PHYSICAL SCIENCE

Advanced High School Chemistry – University of Kentucky

Astronomy: Exploring Time and Space – University of Arizona

How Things Work: An Introduction to Physics – University of Virginia

Intro to Physics

Introduction to Chemistry: Reaction and Ratios – Duke University

Introduction to Chemistry: Structures and Solutions – Duke University

The Science of the Solar System – CalTech

CODING & COMPUTER SCIENCE

Algorithms (Part 1) – Princeton University

Algorithms (Part 2) – Princeton University

C++ for C Programmer (Part A) – UC Santa Cruz

Data Science and Machine Learning – Harvard University

Data Science: Capstone – Harvard University

Data Science: R Basics – Harvard University

Data Science: Visualization – Harvard University

Human-Computer Interaction by Georgia Tech

Intro to Artificial Intelligence

Intro to Point & Click App Development

Introduction to Artificial Intelligence with Python – Harvard University

Introduction to Programming – University of Edinburgh

Statistics and Computational Tools for Data Science – Harvard University

Swift for Beginners

Using Python for Research – Harvard University

Physics + Python

VISUAL & PERFORMING ARTS

Art & Activity: Interactive Strategies for Engaging with Art – The Museum of Modern Art

Drawing and Painting on the iPad With Procreate

Getting Started With Music Theory – Michigan State University

The Art of Music Production – Berklee

The Art of Vocal Production – Berklee

Character Drawing Art School: Complete Character Drawing Course

PianoForAll

The Ultimate Portrait Course

LIBERAL ARTS

Ancient Masterpieces of World Literature – Harvard University

Global Diplomacy: Diplomacy in the Modern World – University of London, SOAS University of London

How to Write an Essay – UC Berkeley

Introduction to Digital Humanities – Harvard University

Introduction to Public Health

Masterpieces of World Literature – Harvard University

Modern Masterpieces of World Literature – Harvard University

Shakespeare’s Life and Work – Harvard University

Tales from the Genome

Tangible Things: Discovering History Through Artworks, Artifacts, Scientific Specimens, and the Stuff Around You – Harvard University

The Complete Presentation and Public Speaking/Speech Course

BUSINESS & ENTREPRENEURSHIP

AP Microeconomics – MIT

App Marketing by Google

Becoming an Entrepreneur – MIT

Instagram Marketing: Complete Guide to Instagram Growth

Business and Impact Planning for Social Enterprise – MIT

Entrepreneur & StartUp MBA

Entrepreneurship 101: Who is your customer? – MIT

Product Design by Google

Technology Entrepreneurship: Lab to Market – Harvard University

User Innovation & Entrepreneurship – MIT

The Complete Financial Analyst Training & Investing Course

An Entire MBA in 1 Course

The Complete Digital Marketing Course

PSYCHOLOGY

Intro to Psychology by San Jose State University

Master Your Brain: Neuroscience for Personal Development

Introduction to Criminology: Explaining Crime

Diploma in Modern Applied Psychology

Cognitive Behavioral Therapy Practitioner Training