NAME ______________________________ DATE _______________

Investigation 1

FAMILY LETTER

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About the Mathematics in This Unit

Dear Family,

Our class is starting the year with a mathematics unit called Counting People, Sorting Buttons from the Investigations 3 Curriculum. This unit serves as an introduction to some of the mathematical routines students will do all year.

These routines include:

• • Counting to take attendance

• • Using the calendar to count days and to keep track of time and events

• • Counting and recording the number of objects in a jar, and creating a set with the same number

• • Counting and analyzing data about our class, such as how many students do (and do not) have a younger sibling

In addition, students are introduced to the manipulatives they will use in mathematics this year and to routines for using and taking care of such materials.

In this unit, students also use these materials to begin to work on sorting and counting. For example, they carefully examine a button and then look for attributes that some buttons have in common.

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