This document discusses motivation and individual differences in second language acquisition. It begins by defining motivation and its components: effort, enjoyment, and investment. It then discusses the Attitude/Motivation Test Battery (AMTB) used to measure motivation towards a second language. Next, it identifies antecedents or factors that influence motivation, including integrativeness, orientations, social support, and self-confidence. It also discusses how individual differences like age, aptitude, and personality can impact second language learning. The document provides examples of individual and group classroom activities to help students apply the lesson concepts.