Understanding and identifying basic 2D shapes based on their attributes is a first grade, Common Core math skill: 1.GA.1. Below we show two videos that demonstrate this standard. Then, we provide a breakdown of the specific steps in the videos to help you teach your class.
Your students should be familiar with the Kindergarten skill of naming regular shapes (i.e. squares, circles, triangles, etc.) and using formal and informal language to analyze and compare the shapes (K.G.1-3). They should also be familiar with making simple shapes to form larger shapes (K.G.6).
This 1st grade skill of understanding halves and fourths will help your students when they move onto 2nd grade. By understanding halves and fourths, your students will be able to work with, draw, and analyze shapes. Your students will learn to identify more complex shapes: triangles, quadrilaterals, hexagons and cubes (2.G.1).
They will also be able to cut shapes into equal parts and deepen their understanding of “part and whole relationship,” explaining that a whole can be made up of parts (i.e. three thirds, four fourths, etc..) They will also learn that the “equal shares of identical wholes” do not need to the same shape to equal each other (2.G.2-3).
Common Core Standard: 1.GA.1 - Distinguish between defining attributes versus non-defining attributes
Students who understand this principle can:
2 Videos to Help You Teach Common Core Standard: 1.GA.1
Below we provide and breakdown two videos to help you teach your students this standard.
Video 1: Understanding Basic Shapes and Attributes
The video begins by listing some attributes of common shapes.
The video then reviews some common shapes, discussing their attributes.
After, the video provides practice for students to match attributes of shapes. Your students can identify which shapes from the choices have the same attributes as the selected shape.
Video 2: Identifying Shapes Based on Their Attributes
The video begins by explaining that almost everything we see is made up of shapes. It then defines that a two-dimensional shape is a flat plane figure or a shape that has two dimensions: length and width.
To classify 2D shapes, Boddle explains we look at the number side and corners. The video then presents examples of basic shapes and reviews the attributes that classify them as such.
The video then offers additional practice for your students to understand and identify shapes.
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*Information on standards is gathered from The New Mexico Public Education Department's New Mexico Instructional Scope for Mathematics and the Common Core website.