## Functional Relationships

When introducing functional relationships, it is important for children to see the need to learn how these concepts can be of help outside the classroom. Making these connections gives students the need to learn mathematics. If we can show children how the mathematics can benefit them, the learning of the concepts becomes much easier.

Materials: paper and pencil for each student

Preparation: Copy the following table on the board.

 Popcorn Brand cost box size = cost per package A \$6 3 packages B \$6 6 packages C \$12 12 packages D \$12 6 packages

Prerequisite Skills and Concepts: basic division facts

• Ask: How many people like popcorn?
Food is always a good hook to entice student learning.

• Ask: If you were going to buy popcorn at the store, which brand and size box would you buy? Why did you make this choice?
Have each student write down their answer and reason on a sheet of paper.

• Have each student copy the above table onto their paper.

This will spark a class discussion. Some children will make their choice based on the number of packages in the box; others will say the price.

• Ask: Does it matter how much the popcorn costs? Why?
Some students may say they shop for the lowest price. Others may say it doesn't matter.

• Ask: Should you always buy the least expensive box? Should you always buy the largest box?
No. It depends on the cost. The goal is to enter a class discussion on the importance of the cost of each package of popcorn.