After some warm-up problems, the teacher presents the problem 1/(x - 7) + 1/(x² - 49) and asks students to find the least common denominator. After explaining the correct way to solve the problem the teacher assigns multiple tasks for seatwork, and students work on their own for the rest of the lesson.

• Part 1: Presenting and Checking Warm-Up Problems [Begin: 02:12]
• Part 2: Presenting and Discussing Problems [Begin: 17:18]
• Part 3: Assigning Multiple Tasks for Seatwork [Begin: 23:37]
• Lesson Table: The lesson table contains a detailed summary of the lesson's mathematical content.