Learn with O.J.

From first principles to working code

Calculus 1 - Unit 1: A quick pre-calculus refresh

Lines, Functions, and the Shapes Behind the Data

Precalculus, minus the stress. Learn slopes, function rules, and graph moves with simple examples you can picture and use.

Calculus 1 Overview

A gentle start to the math behind reliable systems

Tour of Calculus I (limits, derivatives, integrals) explained in everyday language. See how “rate of change” and “total over time” show up in real life and SRE work.