Projects on Jean-François Rondeau

Print Labels

Wed, 09 Sep 2026 00:00:00 +0200

ltn-print-labels is a standalone vanilla-JavaScript module (ESM, zero runtime dependencies) that turns a class roster into a printable label grid of student names — the kind you cut out and stick on trays, cubbies and notebooks. It handles the fiddly parts a teacher actually hits: two children called Léa become Léa M. / Léa C. (shortest last-name prefix that separates the group), the class is repeated a whole number of times to fill an A4 page, labels are butted together so the 1 px borders double as cut lines, and every label gets its own font size — the nominal size for names that fit, shrunk only for the ones that would overflow, so no column is ever widened and no name is ever hyphenated.

School Workshop Assigner

Wed, 02 Sep 2026 00:00:00 +0200

school-workshop-assigner is a standalone JavaScript module (ESM, one runtime dependency) that assigns students to elective workshops fairly, under real constraints: per-workshop capacities, per-pair exclusions (“keep these two apart”), and messy multi-class CSV input merged from one file per class. All the solving runs client-side — the HiGHS mixed-integer solver compiled to WebAssembly — so a teacher-facing app needs no backend.

Instead of maximizing a single weighted score (which an optimizer can game by sacrificing a few unlucky students), it optimizes in strict priority order: first the number of students who get their 1st choice, then 1st-or-2nd, then any of their three, and finally it spreads the leftover “no choice available” students evenly across classes rather than dumping them all on one.

Classroom Layout

Sun, 30 Aug 2026 00:00:00 +0200

ltn-classroom-layout is a standalone vanilla-JavaScript module (no framework, zero runtime dependencies) that renders an interactive classroom seating chart: a desk grid, round and oval tables, per-desk rotation and colour, drag-and-drop student assignment, border objects (wall, board, door, window), wheel zoom, print / PDF export and JSON import / export.

I originally built it for Le Tableau Noir and released it as a reusable package so any teacher or app can embed it.