## Why and What of Operations

Why engaging with operations is crucial for children’s early mathematics learning.

## Mathematics of Operations

Several different approaches to explicating the important mathematics that underlies the content area of operations

## Development of Children's Thinking on Operations

Videos of children, activities for prospective and practicing teachers, and readings that portray the development of an understanding of operations

## Assessing Operations

Materials designed to explain and illustrate the importance of the *formative assessment* of children’s thinking on operations.

## Supporting Classroom Practice

Resources that teacher educators can use to support teachers to develop classroom practice that engages young children in operations.

## Vignettes

Fictionalized but very real examples of participants' experiences in learning to teach, and teaching, early math.

## Getting Started

Teacher educators are invited to use these materials flexibly, with varied settings, amounts of time, and participants. We present a variety of possible ways of getting started with these resources.