## Number and Operations: Building a system of tens. part 1Illustrates students solving problems and explores their thinking to discover what they understand and misunderstand about place value in our base ten number system. Examines how this understanding affects their work with computation. Filmed in a variety of classroom settings with children and teachers of different races and ethnic groups and a balance of girls and boys. |

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### Contents

Introduction | 1 |

Recognizing and keeping track of groups of 10 while operating | 19 |

Written numerals and the structure of tens and ones | 43 |

Copyright | |

5 other sections not shown

### Common terms and phrases

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