This document discusses a teacher's guide to positive reinforcement. It explains that positive reinforcement can encourage students to continue improving when grades start to decline. There are three types of positive reinforcement: natural reinforcement from proper behaviors, social reinforcement like praise from teachers and peers, and activity reinforcement by allowing students to participate in favored activities. The key is knowing each student's preferences for how they like to be encouraged and using different reinforcement methods tailored to individual students. The goal of positive reinforcement is to help students see the changes they want to see in themselves and their learning.