Geometry

Reason with shapes and their attributes.

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This fraction supplement includes three activities in which students name and represent commonly used fractions, such as 1/2, 1/3, and 1/4. Through these activities students explore unit fractions and non-unit fractions of a whole as well as fractions of a set. Each activity includes instructions, guide questions, and extension suggestions. | Activity, Lesson Plans Grade Level: 1, 2, 3 | |

This exploratory problem provides students a way to consolidate their understanding of halving and halves and gives students experience of mathematical proof. The students are given multiple images of squares split in half. The goal is to prove how they are correctly halved and to think of other ways to split a square into two halves. The Teachers' Notes page offers rationale, suggestions for implementation along with a PowerPoint presentation, discussion questions, ideas for extension and support, and printable (pdf) worksheets of the problem. | Activity Grade Level: 1, 2, 3, 4, 5 Resource is part of a PD collection | |

This problem consolidates children's understanding of halving in a spatial context and will help them to develop their powers of visualization. The students are given four different shapes and the goal is to divide them each into two parts that are exactly the same. The Teachers' Notes page offers rationale, suggestions for implementation, discussion questions, a link to an extension activity, Same Shapes (cataloged separately), and a link to a simpler activity, Halving (cataloged separately). | Activity Grade Level: 1, 2 | |

This interactive Flash applet develops children's fraction concepts (partitioning, equivalence, and unit) by building on their informal understanding of rational numbers in the familiar context of sharing cookies fairly among friends. Users decide on the number of friends, the shape and number of the cookies, and how to cut and distribute them equally. The activity is very flexible and incorporates multiple representations of fractions, area models, numerical symbols, and voice cues. Downloadable pdfs of cookie images are provided as well as a User Manual that includes implementation suggests and a review of research. | Activity, Instructor Guide/Manual, Interactive Media Grade Level: 1, 2, 3, 4, 5 Resource is part of a PD collection | |

This document provides descriptions and examples of what each Mathematics Common Core standard means a Grade One student will know, understand and be able to do. This "unpacking" of the standards provides instructional guidelines and was developed to assist North Carolina educators teach the Mathematics Common Core (Standard Course of Study). | Reference Materials Grade Level: 1 | |

This booklet (PDF) of pattern block resources contains activities aligned to the CCSS standards for grades K-2. There are six activities in this booklet, two activities per grade level K-2. Included with each activity are the directions, list of materials, and the blackline masters for teacher and student use. | Activity, Game Grade Level: K, 1, 2 | |

This four-page article describes four basic approaches children use in understanding fractions as equal parts of a whole. Topics covered include working with equal shares, partitioning regions and units, understanding of fraction equivalence, and ideas for teaching fractions more effectively. References are given. | Reference Materials, Article Grade Level: 1, 2, 3, 4, 5 Resource is part of a PD collection |