Specimen III · 09
Khan Academy
free
Entirely free nonprofit, beginner-focused
No card ever. Beginner onboarding; less depth than freeCodeCamp/TOP.
| Habitat | Learning |
| Access tier | free |
| Relevance to stack | low |
| Last active signal | 2026-03 CS-Python Unit 7 |
| Verified alive | yes — pressed 2026 |
| Specimen no. | III · 09 |
| Live habitat | https://khanacademy.org |