## Common Core State Standards for Mathematics

Grade(s) 1 resources related to the following standard:
Geometry
Reason with shapes and their attributes.
1. Distinguish between defining attributes (e.g., triangles are closed and three-sided) versus non-defining attributes (e.g., color, orientation, overall size); build and draw shapes to possess defining attributes.

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This 46-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 1 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 and 2-5.
Instructional Strategy, Reference Materials
This web page provides links to resources aligned to the CCSS that guide and support first 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 activities were designed to measure students' ability to solve non-routine problems, explain and justify their solutions, and promote high level thinking skills. Resources are listed for specific grade 1 standards and are also organized by progression for an alternate search route.
Instructional Strategy, Problem Set, Reference Materials
This page hosts a collection of geometric tasks in pdf format that are aligned to the CCSS standards 1.G1 through 1.G3. It also has links to supplementary literature and learning materials.
Activity, Problem Set, Image Set
This interactive Java applet gives students practice in sorting attribute blocks by color, shape, or size. In each problem students are presented with a set of objects that share a common attribute, and they must identify objects from another set that have the same attribute. Students can check their solution, and have another try or request a new problem. Teacher information about the blocks and their classroom implementation is included.
Activity, Interactive Media
This interactive Flash lesson helps students to distinguish circles from other shapes in a real world environment. The animated pages give printed and voiced instructions. A pdf teacher guide is available at MathActive Lessons for Grades K-2 (cataloged separately), which also includes links to unvoiced, Navajo, and Spanish versions of the lesson (see #1, 3, 4).
Activity, Interactive Media
This interactive Flash lesson helps students to distinguish triangles from other shapes in a real world environment. The animated pages give printed instructions in English. A teacher guide is available [see #7 at MathActive Lessons for Grades K-2 (cataloged separately)].
Activity, Interactive Media
This familiar game can be played by one or two players taking turns. Players choose to match equivalent representations of numbers, shapes, fractions, or multiplication facts. The game can be played in clear pane mode, or for added challenge, with the windows closed.
Game
Grade Level: K, 1, 2, 3, 4, 5