Tech explained
How can a car fly?
The new Tesla Roadster, explained from Grade 3 to high school: air pressure, push and grip.
Learn by doing.
Free, with no sign-in: chapter 1 of every course, the films, Fun & Think, chess and the cube, and a first topic of every lab.
Learn
Courses for every grade, Pre-K to Grade 12, in teaching order.
Math
Pre-K to differential equations. Every figure is something to move. 933 lessons.Science
Picture books that start with a guess, Kindergarten to Honors Physics. 611 lessons.Reading
Stories a page at a time, with Pip beside you. 233 lessons.Life Skills
Money, safety, feelings and choices. 128 lessons.
Labs
Try things and see what happens. A first topic of each is free, with no sign-in.
Watch
Big stories in technology, explained from Grade 3 to high school. Free, with no sign-in.
Think and play
Puzzles, chess and the cube, with no points or timers. Chess and the cube are free, with no sign-in.
Brain Gym
Puzzles for every kind of thinking, Pre-K to Grade 12. 19 rooms.Chess Academy
Learn chess piece by piece, with Pip.Play chess
A whole game against the computer, at four strengths.Cube Academy
Solve a Rubik’s Cube one layer at a time.Fun & Think
Quick logic, pattern and memory games for a short break.
For grown-ups
Paper, plans and progress, for the grown-up beside them.
Family page
What each child covered, and where they stopped.Worksheets
A worksheet and answer key for every lesson.Competition Prep
Test and contest problems, from Math Kangaroo to the SAT.This week
After a lesson, four short homeworks across the week.Where to start
A short test in math and reading that suggests a course.
For parents
You do not have to become the teacher.
No ads, and no points, badges or timers. A parent or teacher holds the account; children never sign in, and nothing about a child is collected. Everything is free until December 31, 2026. Sign in to open it all; chapter 1 of every course needs no account.
Grades
One place to learn, Pre-K to Grade 12.
Not a pile of worksheets to search through. Every course runs chapter by chapter, in teaching order, so a family can start at the beginning and go straight through with no gaps. High school is named courses: Algebra 1 up through AP Calculus and AP Statistics; Biology, Chemistry and Physics, each with an Honors track; Physical, Earth and Space, and Environmental Science.
