This document discusses clauses of contrast and purpose in English. It introduces conjunctions such as although, even though, though, despite, in spite of that are used to express contrast. It also discusses expressions like to, in order to, so as to that indicate purpose. The document provides examples of how to use these conjunctions and expressions in sentences. It then presents practice questions to test understanding, asking students to complete sentences using one of the introduced words. Finally, it previews that the next class will focus on vocabulary from a reading passage titled "Suffering for Science."