Lessons
Free self-study lessons in mathematics and physics. Each lesson explains one idea in plain language, lets you explore it in an interactive demo, walks through worked examples one step at a time, and ends with questions you can check yourself.
Subjects
- Mathematics Functions, series and the ideas behind them, each one shown on a graph you can change. 1 lesson
- Physics Forces, energy and momentum, with simulations you can run and change. 18 lessons
- SAT SAT Math skills, one question type at a time, with practice in the style of the test. 1 lesson
- AP Calculus AB/BC Limits, derivatives and integrals for the AB and BC exams. Coming soon
How the lessons work
- Read and predict. Each part starts with a short explanation and a question to think about before you read on.
- Explore. Interactive demos let you change the numbers and watch what happens.
- Follow the examples. Worked examples open one step at a time, so you can try the next step yourself first.
- Check yourself. Practice questions give instant feedback, and every answer has a full solution.
Mark a lesson complete when you finish it. Your progress is stored in this browser only, so nothing is sent anywhere.
New lessons and books by email
One short email when a new lesson or book is released. No other mail.
Opens your email app with a short message to info@zaidberjis.com.