Impact
Measure what grows.
A statistics project that inflated its own numbers would be a poor advertisement for itself. Every figure below is counted from the live curriculum at page load. Anything we cannot count yet is simply not here.
Counted live · 2026What exists today
Counted from the database, not from a slide
These four figures are read at page load. If a course is unpublished tomorrow, this page says so tomorrow.
3
Structured learning levels, grade 3 through grade 12
6
Courses published and sequenced
295
Lessons written, with checkpoints
103h
Of material, at the pace it is designed for
43 units across 6 courses. See the catalogue
The curriculum
Where the material actually sits
Lessons per course, in catalogue order. The ladder gets heavier as it climbs, which is what it should do — and it shows plainly where the thin parts still are.
- Data ExplorersGrades 3-537
- Patterns in DataGrades 5-743
- Probability and Data ReasoningGrades 7-951
- High School Statistics FoundationsGrades 9-1258
- Data Literacy and Applied StatisticsGrades 9-1251
- AP StatisticsGrades 9-1255
What holds regardless
Three things that do not depend on scale
Free, with no tier above it
Every course, every lesson, every assessment. There is no paid plan and no plan to add one.
Private by default
A student's progress is a record for them. It is never published, ranked, or shown to other learners.
Open without an account
The first course runs in full with no sign-up, so nobody has to hand over an email to find out whether this is any good.
Next
The fastest way to change these numbers
Use it, or help run it. A student working through a course is the only thing that turns any of the figures above into the ones below them.