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### 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.

### 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.### Toy-Shop Numbers

Pre-K-2

A toy-shop theme is used to help stimulate and generate discussion about numbers. Students use examples from a toy-shop to identify real-world uses of numbers and to write stories about those numbers.### Create a House Number

Pre-K-2

This lesson focuses on forming 3-digit house numbers to meet specific requirements. Careful reading of information and understanding of mathematical language are important to finding appropriate solutions. Using the problem-solving strategies of looking for patterns and establishing an organized list will aid students in finding all the possible solution sets.### Numbers and Me

Pre-K-2

In this lesson, students participate in activities in which they focus on the uses of numbers. The activities explore how students use numbers in school and every day settings as a way for students and the teacher to get to know each other at the beginning of the school year.### What’s Next?

3-5

Students begin their study of growing patterns by making linear
patterns with pattern block shapes using several pattern cores. They
extend a partner’s pattern and find the missing element in a pattern.### Looking Back and Moving Forward

3-5

In this final lesson of the Unit, students use logical thinking to create, identify, extend, and translate patterns. They make patterns with numbers and shapes and explore patterns in a variety of mathematical contexts.