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Reading Levels Comparison Chart
A comprehensive comparison chart consolidating the most commonly used reading level systems in one place
since Jun 16, 2026 · HTTP 410
CohortClass of 2026What it is
A comprehensive comparison chart consolidating the most commonly used reading level systems in one place. Helps young readers and educators quickly identify appropriate books by standardizing across different leveling frameworks. Simplifies the book selection process by displaying all major reading level systems side-by-side.
HTTP liveness
9 probes since Jun 16Jun 16Jul 13
AliveHard-dead (404/5xx/parked)RedirectedUnverified (timeout/DNS/block)
Observed events
probes · press · GitHub- Jun 16, 2026First probe — downDead · 404
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Pulse Indexobserved activity
9 probes0 pressGitHub –Tranco –
Not enough observed signals for a Pulse Index (needs 2+ signal families).
Cohort survival · Class of 2026weekly
567 products launched in 2026 · 100% still active
567 active0 sunset
Still active
100%
Median lifespan
4.9y