Open Items

Open assessment infrastructure for K-12 education. 34K+ CC-licensed items, AI-generated, difficulty-calibrated, human-reviewed.

Student Practice

Adaptive learning with immediate feedback

Elo-rated practice with spaced repetition. Difficulty adjusts to your level.

Speed-based math fact practice with timer, streaks, and real-time stats.

Try the full assessment experience with 9 different item types.

Test and approve educational content

42 widget-based assessment items. Review with keyboard shortcuts (j/k/a/r).

Test 14 math widgets: ten frames, number lines, clocks, area models.

Workbooks, themed worksheets, and paper widget renderers.

Browse standards and skill coverage

Browse standards frameworks and content coverage by grade and domain.

Coverage dashboard, learning journeys, and prerequisite relationships.

18 interactive math widgets for use in assessment items.

AI generation and playlist curation

Generate 7-item difficulty sequences using Gemini 3 Flash.

Browse items by skill and build custom playlists with drag-and-drop.

Generate printable PDF worksheets in multiple styles.