the pattern always work?" They will then take action based on this new awareness of the problem. In this way, the teacher can improve the ability of students to think developmentally and deductively.
This example uses the multiplication of two numbers with the same number for the tens digit and 5 for the ones digit. The patterns that appear in these kinds of calculations are shown in Figure 1. We want students to learn the joy of discovering a pattern that makes calculation easier or the activity of working together to find patterns and think about why they occur.