Geometry

Reason with shapes and their attributes.

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Resource | Resource Type Grade Level | Rating |
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This 60-page pdf document demonstrates the connections between the CCSS content standards and the mathematical practice standards. It is a compilation of research, standards from several states, instructional strategies, common misconceptions, and examples for each standard at the grade 3 level. It is intended to help teachers understand what each standard means in terms of what students must know and be able to do. Additional flip books are cataloged separately for grades K-2 and 4-5. | Instructional Strategy, Reference Materials Grade Level: 3 | |

This web page provides links to resources aligned to the CCSS that guide and support third grade mathematics teaching and learning. Tasks developed by the Mathematics Assessment Resource Service (MARS) and Problems of the Month, (POM home page is cataloged separately) developed by the Noyce Foundation are included. The tasks were designed to measure students’ ability to solve non-routine problems, explain and justify their solutions, and promote high level thinking skills. They include the scoring rubric, student responses, and discussion of student understanding and misconceptions. Resources are listed for specific grade 3 standards and are also organized by progression for an alternate search route. | Instructional Strategy, Problem Set, Reference Materials Grade Level: 3 | |

This page hosts a collection of geometric tasks in pdf format that are aligned to the CCSS standards 3.G1 and 3.G2. It also has links to supplementary literature and learning materials. | Activity, Problem Set, Image Set Grade Level: 3 | |

This question and answer service for math students and their teachers offers a searchable archive all about two-dimensional geometry at the elementary level. | Reference Materials, Community Grade Level: 3, 4, 5, 6+ | |

This 5-minute professional development video clip shows students engaged in the Common Core Practice Standard #6, as students explore fractions through fraction strips and a game. The learners attend to precision in terms of accurately adding fractions to one exact whole, communicating their ideas clearly, and recording results. Additional resources include a video transcript, teaching tips, and a link to a professional development reflection activity based upon the video. | Instructional Strategy, Video Grade Level: 1, 2, 3, 4 | |

This 2.5 minute animation introduces children to the concept of a fraction as part of a whole. It defines numerator and denominator in both slash and horizontal bar format and challenges viewers to name two fractions represented by visual models. | Lecture/Presentation, Video Grade Level: 2, 3, 4 | |

This 22 slide interactive module provides details and examples to support the progression of the CCSS Fraction Standards for grades 1-8. Throughout the module are active links to the standards, a glossary, and examples and solutions. | Reference Materials, Voice Recording Grade Level: 1, 2, 3, 4, 5, 6+ | |

This professional development video clip shows students engaged in the Common Core Practice Standard #3-Construct viable arguments for conclusions reached and critique the reasoning of others. Students work with geoboards to explore the concept of "halves" which requires them to explain their reasoning and justify their findings to their classmates. Additional resources include a video transcript, teaching tips, and a link to a professional development reflection activity based upon the video. A related clip (cataloged separately) shows the same exploration by the same students but the video is focused on Common Core Practice Standard #6—Attend to precision is evident. | Instructional Strategy, Video Grade Level: 3, 4, 5 | |

This narrative document describes the progression of Geometry across the K-6 grade band. It is informed both by research on children's cognitive development and by the logical structure of mathematics. The document discusses the most important goals for elementary geometry in three categories, namely, geometric shapes and their categories, composing and decomposing geometric shapes, and spatial relations and spatial structuring. | Reference Materials, Article Grade Level: K, 1, 2, 3, 4, 5, 6+ Resource is part of a PD collection | |

This interactive Java applet helps users explore equivalent fractions through partitioning circles and squares. The applet provides a random fraction and the user creates one or two equivalent representations of that fraction by partitioning and coloring a square (or circle). The applet also plots the fraction on a number line and points from the shape to the number line displaying its equivalent value after the fraction is built. Options include choice of circles or squares, one or two equivalent fractions, and a scoring feature allows users to keep track of the number correct. | Activity, Interactive Media Grade Level: 2, 3, 4, 5 |