Students use Scratch to compare fractional parts of sandwiches. They will program the computer to cut the sandwich in equal parts (based on the denominator) and then display a certain number of these sandwich parts (based on the numerator). They will program rules representing greater than, less than, or equal to that are then used to identify the correct symbol when comparing fractions.
Students compare fractions with the same numerators on a number line. Students develop rules for how to determine whether one fraction is greater than, less than, or equal to another fraction with the same numerators by looking at the denominators.
Students use variables and multiple if, then conditions. Students see how the use of variables in conditionals can result in different outcomes.