The training ground for Euler100
Learn the tool here, apply it at Euler: STELLA lays the mathematical basics of every Euler level for Juniors, children 13 and under — the championship's age range — with Leo, the AI tutor, and the human teachers of the Euler Faculty. One account works on both platforms. Seniors (14–18) open in 2027.
Find your tutor
Faculty Members with live calendars. Pick a slot in your own time zone, book, and meet on STELLA.
Booking, honestly
Teacher-published slots, one clear price split, confirmed only on payment, one fair cancellation rule.
The Family space
Log in, or register. Two private spaces: the parent's, with requests to approve and the tutor calendar, and the candidate's own login, where they browse tutors and ask to book. The parent always approves and pays. On the family plan, the parent also sees the feedback statistics (perseverance and volume), and Leo, the AI tutor, coaches inside Euler’s adventures.
Create your Orbit
No set-up fee and no monthly cost: you keep 75% of everything you sell. Build your profile, upload your materials, set your prices, invite learners into your orbit.
Marking coming
Leo marks your scripts against your memo, Clara checks every mark, you sign. Opens to schools after the first pilots — November 2026.
Leo coming
Leo, the AI tutor, coaches inside Euler’s adventures on the family plan: the child brings the difficulty, Leo asks before it tells and never gives the answer first. On STELLA, Leo rests. What Leo is, and is not →
A computer program, not a person. Named for Leonhard Euler.
Beta 0.2: the Faculty, the calendars and the Family space are real; bookings and payments open after the 11 October pilot and are marked coming wherever they appear. A computer program, not a person. Named for Leonhard Euler.