Of possible interest, presents basic notions of calculus as a dialogue

Calculus Basic Concepts For High Schools by L. V. Tarasov

https://archive.org/details/LevTarasovCalculusBasicConceptsF...

Honestly it's hard to beat how good 3Blue1Brown is at this... https://www.youtube.com/watch?v=WUvTyaaNkzM&list=PLZHQObOWTQ...