I build applications for teachers and schools, and I teach others how to do it themselves. Every bug someone reports is published here, with the time it took to fix.
Software for teachers and schools. Each product says how far along it is, without rounding up. Where research stands behind it, that is stated too, even when the figures rest on test data for now.
Speaking tasks for language teachers. Pupils record their answer; Hablar transcribes it, marks grammar errors and proposes a score for each criterion. The teacher decides.
More about Hablar
From an idea for school software to a proposal your head teacher can read. A guided conversation in Dutch that ends in a document, an estimate and a phasing.
More about Chalkline
An open scale from 0 to 100 for the difficulty of reading texts, with an analyzer that scores any text.
More about FRS
I teach two courses. In one you build a system for your own work, in the other an app for your own school. Both use AI, and in both you learn where to check it.
With Claude Code and Obsidian.
EUR 1,600 excl. VAT, per participant
Programme and sign-upTwo days. On day one you build an app for your own school, on day two you make it safe, on test data.
EUR 495 per person, excl. VAT
More about the bootcampEvery bug that someone reports in one of my products is listed here, and every feature that someone asks for. With the time between report and fix, and the date I promised. Also what is still open. example Real reports appear here from the trial period at the end of October.
English as an assignment language
Health check hung on a slow database
Sign-up form shifted 3 pixels sideways on a narrow phone
Login screen showed English text to Dutch-speaking teachers
Seven on the reading scale, four on speaking skills. Each paper says what its numbers rest on, even when that is synthetic test data.
The papers for HablarThe papers for FRSI build software for education, and every day I work with a system of more than 10,000 notes and 200 workflows that I built myself. That system is also what I teach in the course.
More about me and contact