Prekindergarten: Unit PK.G.A.1-2, Identify and Describe Two-Dimensional Shapes (circles, triangles, rectangles; including a square which is a special rectangle)

Enduring Understandings:

1. Geometry and spatial sense offer ways to interpret and reflect on our physical environment.
2. Analyzing geometric relationships develops reasoning and justification skills.
3. If I join shapes, I can create new shapes.

Essential Questions:

1. How do geometric models describe spatial relationships?
2. How are geometric shapes and objects classified?
3. Where in the real world can I find three-dimensional shapes?
4. How can objects be represented and compared using geometric attributes?
5. How can I put two-dimensional shapes together and take them apart to form other two-dimensional shapes?



Standards Addressed in This Lesson:It is critical that the Standards for Mathematical Practice are incorporated in ALL lesson activities throughout the unit as appropriate. It is not the expectation that all eight Mathematical Practice will be evident in every lesson. The Standards for Mathematical Practice make an excellent framework on which to plan your instruction. Look for the infusion of the Mathematical Practices throughout this unit.


1. PK.G.A.1 Match like (congruent and similar) shapes.
2. PK.G.A.1 Group the shapes by attributes.



Lesson Topic:Shapes of things that we eat.


Relevance/Connections:


3. Students are using objects with different attributes on daily basis. They are beginning to identify the physical attributes of objects (color, size, shape, texture, sound, taste, and function). As they move to mathematical attributes of objects, their prior knowledge of common objects will enhance their awareness and understanding



Student Outcomes:


The student will:

4. Students are using objects with different attributes on daily basis. They are beginning to identify the physical attributes of objects (color, size, shape, texture, sound, taste, and function). As they move to mathematical attributes of objects, their prior knowledge of common objects will enhance their awareness and understanding
5. Identify and describe two-dimensional shapes (circles, triangles, rectangles; including a square which is a special rectangle).
6. Match similar shapes when given various two-dimensional shapes (students do not need to name the shapes or even identify attributes at this time).
7. Sort shapes by applying real-life experiences of sorting.
8. Gain knowledge that rectangles and squares may be grouped together as 4-sided figures.
9. Explain the groupings made when sorting.
10. Distinguish examples and non-examples of various shapes.
11. Become engaged in problem solving that is about thinking and reasoning.
12. Collaborate with peers in an environment that encourages student interaction and conversation that will lead to mathematical discourse about geometry.

Method for determining student readiness for the lesson:

Circle time activities involving colors, comparing, and measurement, sorting and classifying. All students will participate because these experiences will provide readiness.

Learning Experience