School Improvement in Maryland

Gr. 1 Unit: Reason with Shapes and Their Attributes

Unit Overview

In this unit, students in grade 1 reason about shapes. They distinguish why a given shape belongs to a particular category using their own words. Through careful observation and description, students learn to differentiate between defining attributes (triangles are closed and have three-sides) and non-defining attributes (this particular triangle is large and red). Students share their understanding through the use of drawings, manipulatives, and real world objects and should be given repeated exposure to regular and irregular shapes in order to build and draw shapes that show defining attributes. Manipulation of shapes and spatial exploration are strongly encouraged. Students in grade 1 also compose two- and three-dimensional shapes to create a composite shape, and compose new shapes from the composite shape. Finally, students in grade 1 begin to build a firm foundation of both geometric concepts as well as number relationships. Partitioning shapes and creating fair shares connects to both the part-whole relationship as well as to early fraction concepts. It is important that students in grade 1 are provided with adequate time and experiences to help them reason and develop deep conceptual understanding of the Standards in this Cluster.

Essential Questions:

  • Where in the real world can I find shapes?
  • How can objects be represented and compared using geometric attributes?
  • How can I put shapes together and take them apart to form other shapes?
  • How can I identify and describe solid figures?
  • How can I compare and contrast two- and three-dimensional shapes?

A question is essential when it stimulates multi-layered inquiry, provokes deep thought and lively discussion, requires students to consider alternatives and justify their reasoning, encourges re-thinking of big ideas, makes meaningful connections with prior learning, and provides students with opportunities to apply problem-solving skills to authentic situations.

Unit Lesson

Additional information such as Teachers Notes, Enduring Understandings,Content Emphasis by Cluster, Focus Standards, Possible Student Outcomes, Essential Skills and Knowledge Statements and Clarifications, and Interdisciplinary Connections can be found in this Lesson Unit.

Available Model Lesson Plans

The lesson plan(s) have been written with specific standards in mind. Each model lesson plan is only a MODEL - one way the lesson could be developed. We have NOT included any references to the timing associated with delivering this model. Each teacher will need to make decisions related ot the timing of the lesson plan based on the learning needs of students in the class. The model lesson plans are designed to generate evidence of student understanding.

This chart indicates one or more lesson plans which have been developed for this unit. Lesson plans are being written and posted on the Curriculum Management System as they are completed. Please check back periodically for additional postings.

CCSC Alignment: 1.G.A.2

Students learn the names and explore the characteristics of solid shapes. They recognize 3-dimensional geometric shapes in the real world and recognize shapes when they are combined with other shapes.

Available Model Lesson Seeds

The lesson seed(s) have been written with specific standards in mind. These suggested activity/activities are not intended to be prescriptive, exhaustive, or sequential; they simply demonstrate how specific content can be used to help students learn the skills described in the standards. Seeds are designed to give teachers ideas for developing their own activities in order to generate evidence of student understanding.

This chart indicates one or more lesson seeds which have been developed for this unit. Lesson seeds are being written and posted on the Curriculum Management System as they are completed. Please check back periodically for additional postings.

CCSC Alignnment: 1.G.A.3

Students partition circles and rectangles into two and four equal shares to learn about halves, fourths, and quarters.