In this lesson, students learned to interpret pie charts by analyzing percentages and degrees. They practiced calculating the percentage of specific values in a total amount, demonstrating how to determine the numerical representation of a percentage in a pie chart. For instance, when 200 toys were sold, and 50% were categorized as a specific type, students used the formula to find that 100 toys represented that category. Overall, the lesson focused on understanding how to translate percentages into actual quantities within the context of charts.