🔒 Owner-only · A-Level

Engagement — Edexcel A-Level

Daily-active students, streak distribution, and a topic × board heatmap of revealed schemes. Query filter: shared Firestore rows tagged board = 'alevel', so IB engagement never leaks in.

Preview data — showing the target-shape tiles. Live numbers light up once we wire the Firestore reveal-event pipeline to A-Level (P2 milestone).

// Daily active · A-Level

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at least one reveal today

🔒 Awaits P2 wire-up

// Monthly active · A-Level

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at least one reveal in 30d

🔒 Awaits P2 wire-up

// Median streak

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50th %ile of `ib_streak` shape

🔒 Awaits P2 wire-up

// D7 retention · A-Level

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signup + 7d activity

🔒 Awaits P2 wire-up

Topic heatmap · sample layout

Rows are A-Level topic slugs, columns are difficulty bands. Cells shade by reveal-count. Real data replaces the placeholder shading once the Firestore pipeline lights up.

Topic	Easy	Medium	Hard
coordinate-geometry-p1	high	med	low
circles-p2	med	med	low
data-s1	high	high	med
forces-newtons-laws-m1	med	low	low
algebra-p1	high	high	med

Firestore filter shape (target)

Reads reveal_events where board == 'alevel'. Aggregated in alevel_daily_metrics/{YYYY-MM-DD} by a scheduled Cloud Function — mirrors the existing IB daily_metrics collection so the same charting utility renders both.