The print version allows teachers to use the problem with their students without giving the students access to the archived answers.
Teachers can use the link to the archived problem to get ideas of student thinking.
The goal is for students to investigate the effect of multiplying an integer by a fraction to scale the size of a balloon's diameter. The students are also exploring the effect of the numerator and denominator on the magnitude of a fraction. Depending on the students' ability to understand the idea of scaling the diameter of the balloon by a ratio, it may be helpful to explore the first carnival booth as a whole group, or in small groups. The pre-activity should also be useful in helping students understand how changing the numerator or denominator affects the magnitude of a fraction. Please email us.