Eight linked pieces — driving question, backward-planned calendar, milestones, team contracts, content workshops, rubrics, critique protocols, and a public product plan — built to PBLWorks Gold Standard and the HQPBL criteria.
✓ Free to start ✓ No credit card ✓ We never train on or sell your lessons
Start with 14 days of Pro, free — the full toolkit of projects and materials, no credit card. Built by a teacher; your lessons are never used to train AI or sold.
Every PBL project and material type — no monthly limit for everyday teaching.
Less than one Teachers-Pay-Teachers resource a month — for every lesson, all year.
Cancel anytime · 30-day money-back guarantee · We never train on or sell your lessons
Teachers never see this screen — on the live site they just sign up with an email and password.
Chalkloom runs on Claude, Anthropic's AI. Add a key once.