A few side projects I build and maintain.
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 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. ...
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. ...