This document outlines a music module divided into three lessons on musical styles from different time periods. The first lesson discusses Impressionism, focusing on Claude Debussy and Maurice Ravel as key figures. The second lesson covers Expressionism, examining the works of Arnold Schoenberg and Igor Stravinsky. The third lesson explores 20th century musical styles including electronic music pioneers like Edgard Varèse and Karlheinz Stockhausen as well as chance music composers such as John Cage. Students are guided through listening activities and assignments to learn about characteristic features of each style.