For teachers: AI tools that save time
Teacher Talk with MystrS: Diffit
Checked October 25, 2026 (Pacific time). Tags: Cyber, AI. No vendor money and no affiliate links.
Best for: differentiation and reading levels, leveled rewrites for IEP and English learner support, quick question sets.
Free vs paid
- Basic: free, with access to resources from the last 90 days.
- Individual Teacher Subscription: "$14.99 per month, billed monthly" or "$149.99 per year, billed annually". Diffit notes "Prices listed are for US customers and may vary per country."
- Diffit for Schools: annual flat rate, quote only.
Privacy
- Students: "Diffit does not collect ANY student data." Students do not log in, and there is no student-facing AI.
- Minimum age: 18. Diffit's terms are for teachers and school staff, and students do not have accounts.
- Compliance: "FERPA and COPPA compliant".
- Data use: "We will never sell your data or use it to advertise third-party products."
- Training: the privacy page does not say whether teacher inputs train models.
- DPA: Diffit says it is "a signatory of the National Data Privacy Agreement and the Student Data Privacy Consortium's statewide privacy agreements".
- SDPC: registry not checked (member login required); vendor statement only.
Time saved
Not measured. Diffit shows survey results, such as 86% of teachers saying it "Makes me a better teacher" (vendor survey, 2,517 teachers, November 2024), but gives no time figure.
Before you use it with students: check that it is on your district's approved list and that the district has signed a data agreement. See the hub page, Which AI Tool for Which Task, for the FERPA and COPPA basics.
Sources. Primary: pricing, individual subscription, privacy. Supporting: Terms of Service (effective March 25, 2024).