This document provides information about a final review session for a Math 21a course, including announcements about additional review sessions and details on the final exam. It outlines the topics to be covered in Part I of the review session, which will focus on partial derivatives and related concepts from chapter 11 on functions of several variables. These include the definition of partial derivatives, Clairaut's theorem, tangent planes, linear approximations, the chain rule, and implicit differentiation.