This document summarizes a frontend crash course on HTML and CSS presented by Rhonda Jaramillo and Joe Previte. The agenda includes learning key concepts of HTML and CSS, reviewing assignments, completing challenges with support, and ways to continue learning. HTML is introduced as the markup language that defines the structure of web pages, while CSS is presented as a style sheet language used to describe the presentation of web pages, including properties to control color, font, layout and more. Assignments for the evening are provided to reinforce the concepts covered.