A curated shelf of the best free learning platforms and video channels — organized by grade level and subject, so students spend time learning, not searching.
Looking for hands-on 3D labs and our 100-masterwork Art Museum? They now live in AI & STEM →
Struggling with a topic from class? Search it on Khan Academy or CK-12, watch the short lesson, then redo the practice set until it clicks.
Preview next week's chapter in 10 minutes the night before — students who preview ask better questions and remember more in class.
Finished early? The high-school channels below go far beyond the textbook — from calculus visualizations to the history of life on Earth.
Both are non-profit, completely free, ad-free, and trusted by millions of students. If you only bookmark two links, make it these.
Every subject, every grade — math (its superpower), science, history, economics and SAT prep. Short videos paired with practice exercises that adapt to your level. Also available in Simplified Chinese, and it works in mainland China.
Free digital textbooks and practice from Grade 1 math through Calculus and Physics — plus Flexi, a free AI tutor for math and science questions, used by 1.5 million students every month.
Choose your grade level, open a subject, and pick a channel — it plays right on this page. Use the playlist icon inside the player to browse every video from that channel.
Opens in a new tab — this university doesn’t allow preview embedding.
A note for parents: all channels here are educational and free, but YouTube is an open platform — for younger children we recommend watching together or enabling YouTube’s supervised experience at home.
Opens in a new tab — this university doesn’t allow preview embedding.
A note for parents: all channels here are educational and free, but YouTube is an open platform — for younger children we recommend watching together or enabling YouTube’s supervised experience at home.
Opens in a new tab — this university doesn’t allow preview embedding.
A note for parents: all channels here are educational and free, but YouTube is an open platform — for younger children we recommend watching together or enabling YouTube’s supervised experience at home.
Opens in a new tab — this university doesn’t allow preview embedding.
A note for parents: all channels here are educational and free, but YouTube is an open platform — for younger children we recommend watching together or enabling YouTube’s supervised experience at home.
Complete courses from MIT, Harvard, Yale, Berkeley and CMU — the same lectures their own students attend, free to take. Pick a subject on the left — most courses play right on this page.
Opens in a new tab — this university doesn’t allow preview embedding.
These are real, complete university courses — free to audit. A motivated high schooler can finish one in a semester; even one lecture a week builds real momentum.
Opens in a new tab — this university doesn’t allow preview embedding.
These are real, complete university courses — free to audit. A motivated high schooler can finish one in a semester; even one lecture a week builds real momentum.
Opens in a new tab — this university doesn’t allow preview embedding.
These are real, complete university courses — free to audit. A motivated high schooler can finish one in a semester; even one lecture a week builds real momentum.
The academic competitions top universities actually recognize — organized by grade level and subject, each linking to its official site. Entry anyone can join · Advanced takes a season of prep · Elite nationally selective.
Still curious? The official site has rules, dates and past problems.
Still curious? The official site has rules, dates and past problems.
Still curious? The official site has rules, dates and past problems.
Every bar is a competition season across the school year, August to July, grouped by subject. Click any row to read its full card above. A full-year bar means rolling entry — start any time. Dates are typical; the official site always has the current year’s exact schedule.
★★★ Entry · ★★★★ Advanced · ★★★★★ Elite — bar colors match. Bars show when contests actually run; registration usually closes weeks earlier, so plan about a month ahead.
Interested in one of these? Talk to your teacher or division office — SHA faculty help students choose the right competition and prepare for it.
Our teachers run structured after-school tutoring Monday–Friday, 3:30–5:30 PM.
Thirty hand-picked classics for each grade band — tap any cover and read the entire book right here, free.
Every title is in the public domain — complete texts courtesy of Project Gutenberg.
