A systematic approach to make textbook supplements

This document outlines a systematic approach called ACoPE (Analyze, Consult, Produce, Evaluate) for creating supplemental materials to accompany textbooks. It describes analyzing textbooks to identify gaps, consulting other sources for ideas, producing new materials by modifying existing ones, and evaluating supplements by piloting them and revising based on student feedback. The goal of supplementation is to better fit the needs of a particular teacher's class by addressing issues like lack of practice activities, cultural relevance, or difficulty level in textbooks.