About Sensim Arithmetic
Part of Sensim Lab
What is this?
Sensim Arithmetic is an adaptive math practice platform covering the full K–6 curriculum — from number bonds and basic addition through long division, fractions, and decimals. It generates worksheets on demand, works entirely in the browser, and requires no account to use.
Why we built it
Most practice tools either drill the same problems endlessly or require expensive subscriptions. We wanted something fast, printable, and free — that a teacher could pull up mid-class or a parent could use at the kitchen table.
How it works
The curriculum is modeled after Common Core State Standards across six units. Each topic has three difficulty levels (Fluency, Practice, Challenge) with a zone-based problem distribution designed to build confidence before pushing toward mastery.
Problems are generated client-side in the browser — no server round-trips for each question. Print mode uses an offscreen measurement pass to bin-pack problems into columns, ensuring clean layouts at any problem count.
Technology
- Frontend Astro 4, TypeScript, Tailwind CSS
- Hosting Cloudflare Pages
- Auth & DB Supabase
- OCR grading Anthropic Claude (via Cloudflare Worker)
- Curriculum 234 topics across 6 units, statically bundled
Contact
Questions, feedback, or bug reports — email us at [email protected].