A four-step math ladder for families, from K–6 arithmetic up to AMC 12. Every solution from first principles.
K–6 adaptive fluency practice, 216 topics.
Grades K–6
One concept at a time, worked from first principles.
Grades 1–8
The bridge from curriculum problems to competition thinking.
Grades 2–8 · bridge to competition
AMC 8 to AMC 12, every problem with a full solution.
AMC 8 · 10 · 12
A parent dashboard for the family lives at sensimlab.com.
Sensim Lab