Contributed educational features to the mphowardlab/essential-math repository by developing comprehensive documentation and tutorials focused on calculus and differential equations. Applied mathematics expertise and technical writing skills to create a detailed guide on exact differential equations, including mathematical definitions, a formal test for exactness, and a step-by-step solution workflow, all authored in Markdown. Further enhanced the repository with a conceptual tutorial explaining derivatives as limits, connecting tangent lines to rates of change through practical examples. These contributions improved instructional clarity, established reusable tutorial structures, and strengthened the repository’s value for learners and practitioners seeking accessible, reliable mathematical resources.