In this lesson, teachers and students learn how to add and subtract time using hours and minutes. The class covers how to add minutes to minutes and hours to hours, and what to do when minutes go over 60. Students practice solving real-life word problems like total time spent on activities or travel. They also learn how to use clocks or timelines to help them understand time better. Subtraction of time is also explained, including finding how much time passed between two events. Exercises, examples, and tests are included to support understanding.