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### Hopping on the Number Line

Pre-K-2, 3-5

In this lesson, students generate sums using the number line model.
This model highlights the measurement aspect of addition and is a
distinctly different representation of the operation from the model
presented in the previous lesson. The order (commutative) property is
also introduced. At the end of the lesson, students are encouraged to
predict sums and to answer puzzles involving addition.### What's the Beat?

3-5

In this activity, students use the average adult's number of heartbeats per minute to predict how many times the heart would beat during various lengths of time. The students also draw conclusions on the basis of information about the human heart rate and that of other animals.### Beverage Sharing and Serving

3-5

Students determine, using a nonstandard cup or plastic drinking container, the minimum amount of fruit drink needed to serve class members.

### A Brownie Bake

3-5

Students determine the amount of each ingredient needed to make brownies, and then they figure out how to divide the brownies evenly among their classmates. This lesson helps students reinforce their measurement skills in a practical situation.### Get the Picture—Get the Story

3-5

In the following lesson, students act as reporters at the Super Bowl.
Students study four pictures of things that they would typically find
at a football game: players, a scoreboard, a crowd, and a concession
stand. Students are asked to create problem situations that correspond
to their interpretation of each of the pictures.### Super Bowl Scores

3-5

This activity focuses on analyzing the scores for football games.
Students study combinations of numbers to produce possible scores for
football games.### Super Bowl Scavenger Hunt

3-5

In many homes, the Super Bowl is an event of some significance. This
activity is designed to have students examine some enjoyable (and,
sometimes, obscure) questions using mathematics during the game. The
questions on the activity sheet require that the students make
observations about the game.### Post-Office Numbers

3-5

A post office is a good example of a real-world environment in which numbers of different types can be found. Whole numbers and fractions are introduced. Numbers that occur in a greater variety of measurement situations can also be introduced. At this level, students should be encouraged to elaborate on the way numbers are used.### Sports Numbers

3-5

Students are familiar with sports and sporting events. Whole numbers
and fractions are used to represent the size of groups or collections
and measurements involving lengths, weights, and times in many sporting
and game situations. This knowledge can be used to give the students
another picture of numbers.### Collecting The Rays

3-5

In this lesson, students explore how variations in solar collectors
affect the energy absorbed. They make rectangular prisms that have the
same volume but different linear dimensions. Students investigate
relationships among the linear dimensions, the area, and the volume of
rectangular prisms.