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### Baby Weight

Pre-K-2

In this lesson, students work with data to complete an organized chart by doubling or halving numbers. Then, they compare data using vertical and horizontal bar graphs.### How Big is Your Heart?

Pre-K-2

This lesson emphasizes the connections between science and mathematics
by using a performance, or authentic, assessment format. Students have
the opportunity to explore applications involving their own heart. This
lesson was adapted from the article, "Ideas: The Beat of Your Heart,"
by Lisa M. Passarello and Francis (Skip) Fennell, which appeared in *The Arithmetic Teacher*Vol.39, No.6 (February, 1992) pp. 32-39.

### Keeping in Balance

Pre-K-2

In this lesson for grades 1‑2, students balance pairs of like and
unlike objects by changing distance from the fulcrum. Students use a
crayon (as the fulcrum) and a ruler to represent the balance.### How Many Steps?

Pre-K-2

In this lesson, students participate in activities to develop concepts of measurement and statistics. Students are asked to measure distances using non-standard units and to record their measurement in a bar graph. Then they are asked to make comparisons using the bar graph.### Take Away

Pre-K-2

The following lesson introduces elementary students to subtraction. The
objective is to create a link between students' experiences and
mathematics. By the end of the lesson it is expected that students have
a deep understanding of subtraction and how it relates to their world.
This lesson was adapted from "Helping Students Understand Subtraction"
by Anita Page, which appeared in the November 1994 *Teaching Children Mathematics*, Vol. 1, No. 3.

### What's the Weather?

Pre-K-2

In this lesson, students analyze information represented by
pictographs. Students are asked to discuss, describe, read, write, and
make predictions about the graphs and the information they contain.### Buttons! Buttons!

Pre-K-2

In the following lesson, students participate in activities in which they focus on connections between mathematics and children's literature. Specifically, students use clues to sort and classify buttons.### Shapes and Poetry

Pre-K-2

Students read the poem "Shapes" from *A Light in the Attic*, by Shel Silverstein, and create their own illustration of the poem. In this lesson, students explore geometric figures and positional words.

### How Big Is a Foot?

Pre-K-2

In this lesson, students read the book *How Big Is a Foot?*, by Rolf Myller. They then create non-standard units (using their own footprints) and use them to make "beds." As a result, students explore the need for a standard unit of measure.

### Graphing Trash Material

Pre-K-2

In this lesson, students participate in activities in which they investigate the data in connection with recyclable materials and develop plans to help the environment.