Observed arrival · 2026-09-03
CS Illustrated — AP Computer Science A
A free browser-based AP Computer Science A course where students write Java by hand, run it in the browser, and test it against hidden cases.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
Field notes
The course combines short lessons with an in-browser Java editor and hidden-test execution, making typing itself part of the exercise. Its anti-paste rule refuses code copied from a website or another person but permits later edits to code the learner typed. The homepage identifies four College Board-sequenced units and says there are fifty Unit 1 labs; progress is stored in the browser rather than sent to the project.
Observed signals
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Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
◉HumanPersonal, local, civic, or handmade
ƒJavaScriptBrowser-side code central
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