Compare Praxis prep
The main paid choice for Praxis prep is between Study.com, ETS’s official partner, and 240 Tutoring, a cheaper monthly option. For Praxis Core alone, Khan Academy’s ETS-partnered prep is free.
Sources: ETS’s store for Study.com, 240 Tutoring’s partner pages (price as reported) and Khan Academy’s Praxis Core page. Checked October 12, 2026.
| Study.com | 240 Tutoring | Khan Academy | |
|---|---|---|---|
| Price | $240 for 4 months | ~$39.99/month (as reported) | Free |
| Tests covered | Core and many Subject Assessments | Core, Subject Assessments and some state tests | Praxis Core only |
| ETS link | Official partner | Independent | Built with ETS |
| Guarantee | See Study.com | Up to 2 months refunded (conditions) | Not applicable |
Official partner against monthly study guides.
→Paid ETS partner covering Subject Assessments against free Core-only prep.
→Monthly study guides against free Core-only prep.
→All three options side by side.
→Common questions
What is the cheapest Praxis prep?
Khan Academy is free but covers Praxis Core only. For Subject Assessments, 240 Tutoring’s reported $39.99 a month is usually cheaper than Study.com’s $240 for four months if you only need a month or two.
Which Praxis prep is official?
Study.com is sold through ETS’s store as an official partner, and Khan Academy’s Praxis Core prep was built with ETS.
Does Khan Academy cover Subject Assessments?
No. Khan Academy covers only the three Praxis Core tests.
Do I need the Praxis at all?
Check your state’s requirements first; some states use their own tests instead of the Praxis. See our tests-by-state page.