Jude Wallis
I am a high school student, and I write and build everything on CalcLearn: the 27 study guides, the 12 teaching calculators, the 5 visualizers, and the 6 reference tables. From the maker of EconLearn, which the Colorado Department of Education lists in its economics resource bank.
Why I built this
I kept hitting the same wall studying calculus. Type a problem into a solver and you get an answer, and maybe a paywall in front of the steps. But the thing I was actually stuck on was never the arithmetic. It was knowing which technique the problem wanted, how to turn a paragraph about a sliding ladder into two equations, or why the ratio test was the right call and not the comparison test.
No tool answered that, because answering it is teaching, not computing. So CalcLearn is built around the method: which one, why that one, and what the idea actually looks like when you move it with your own hands.
How this content gets checked
A wrong worked example on a math site is worse than no worked example, so nothing ships straight from a first draft. Every page goes through the same pipeline:
- Every derivative, integral, and limit in a worked example is re-derived independently, on its own, without looking at the stated answer.
- Curriculum claims (unit weightings, topic coverage, exam format) come from the official College Board Course and Exam Description, read directly rather than from summaries. The unit pages quote the current weighting bands, which differ from the older figures still circulating on other sites.
- The problem banks behind the calculators are cross-checked numerically by an automated test suite. A wrong answer in a bank fails the build, so it cannot reach a student.
- Every piece of math on the site is rendered at build time with strict error checking. Broken notation breaks the build rather than the page.
If you find an error anyway, it is a bug and I want to know. The fastest way to reach me is the LinkedIn profile linked below.
Recognition
Every item here links to the source, so you do not have to take my word for any of it. Two belong to me; the third belongs to EconLearn, the sibling site, and is listed that way on purpose.
Economics Olympiad: 2nd internationallyJude Wallis
Placed 2nd internationally at the Economics Olympiad, an international economics competition for secondary students.
Published in YFS MagazineJude Wallis
Wrote "What Building My First Product in High School Taught Me About Customers" for YFS Magazine, a publication for founders and small-business owners.
Listed by the Colorado Department of EducationEconLearn
EconLearn, the sibling site, is listed in the Colorado Department of Education's economics resource bank alongside Khan Academy and EconEdLink.
The Learn Network
CalcLearn is one of 4 free study sites I build and maintain, together covering 50+ pages on this site alone:
- EconLearn
- StatsLearn
- PhysicsLearn
- CalcLearn (this site): AP Calculus AB and BC