Not a chat window that hands you the answer. Not a quiz that hands out badges. A structured lesson: short concept, examiner-graded past-paper drills, and homework that auto-targets the skills you missed.
No credit card · 50 free credits to try every feature
Practice & homework
Finish a lesson and a homework set is already waiting — built from the exact skills you slipped on. Or generate your own set any time: target your weaknesses, keep it balanced, or go full exam-style. Every question is graded against the real IB markscheme, with the working shown when you miss.
Progress & weaknesses
Every graded answer updates your mastery — by topic, by skill, and across three dimensions of understanding. The platform surfaces your weakest skills and quietly steers your next questions toward them, so your practice always lands where it actually helps.
Thetas is in closed beta. Plans are quoted per school, centre or tutor, because what they cost depends on how many students you teach, which subjects you run and how much of the platform you want built around your own syllabus.
One monthly fee covers the platform, the adaptive engine, hosting and support, with AI tutoring included rather than metered. Bringing your own syllabus and question bank onto the platform is quoted separately.
We reply to every enquiry ourselves — no sales sequence.
Sign in with Google or email, pick a concept from the IB Math syllabus, and the first lesson is yours in under a minute. 50 free credits — no card required.