Math compounds. A K-4 kid who locks in number sense and arithmetic facts walks into algebra ready; one who doesn't, fights it forever. Cullinan's math track is built around mastery gates so we don't move past what hasn't stuck.
K-12
Grade range
10
Levels authored
380
Total lessons
1 : 1
Tutor per child
Lessons are 1:1 with an adaptive tutor that asks probing questions instead of giving answers. After every 5 mastered lessons, an end-of-unit test (multiple-choice + short-answer + a spoken explanation + a short essay) verifies the kid actually owns the material. Spaced-repetition reviews bring back facts before they fade.
Each level contains multiple lessons. The adaptive placement system picks the right starting level for each child — they may start higher or lower than the grade range suggests.
Kindergarten Math
Grades K–K · 28 lessons
1st-2nd Grade Math
Grades 1–2 · 51 lessons
3rd-4th Grade Math
Grades 3–4 · 63 lessons
5th-6th Grade Math
Grades 5–6 · 52 lessons
7th-8th Grade Math
Grades 7–8 · 63 lessons
Algebra I (9th Grade)
Grades 9–9 · 39 lessons
Geometry (10th Grade)
Grades 10–10 · 27 lessons
Algebra II / Trigonometry (11th Grade)
Grades 11–11 · 27 lessons
Pre-Calculus (12th Grade)
Grades 12–12 · 27 lessons
College Mathematics
Grades 13–16 · 3 lessons
Most homeschool math curricula either move at a fixed pace (wrong for any individual kid) or rely entirely on the parent to teach (impossible with multiple kids). Cullinan does both jobs: an adaptive tutor that places, teaches, and verifies — so you supervise instead of teaching.
Every child profile in your house gets adaptive placement, daily plans, and real mastery verification — across Math and every other subject. No credit card to start.