Lesson 5

Mystery Shapes

Est. Class Sessions: 2
X

Mathematical Standards

1.G.A
Reason with shapes and their attributes. (1.G.A.1, 1.G.A.2)

Standards for Mathematical Practice

MP1.
Make sense of problems and persevere in solving them.
MP3.
Construct viable arguments and critique the reasoning of others.
MP4.
Model with mathematics.
MP5.
Use appropriate tools strategically.
MP7.
Look for and make use of structure.

Students examine the outline of a shape formed by combining pattern blocks. Student pairs determine the composition of the shape and share their thinking with the class.

Content in this Lesson

  • Identifying two-dimensional shapes [E1].
  • Describing the properties of two-dimensional shapes [E2].
  • Composing and decomposing two-dimensional shapes using pattern blocks [E4].
  • Justifying visual and spatial reasoning by identifying the properties of shapes [E5].
X

Materials for Students

Daily Practice and Problems Lesson Assessment

Student Books

 Student Activity Book

Teacher Resources

 Teacher Guide - digital

Supplies for Student Pairs

pattern blocks

Materials for the Teacher

Display of Mystery Shapes Master (Teacher Guide)
Display of Will a Square Work? Master (Teacher Guide)
Unit 2 Assessment Record
Unit 2 Individual Assessment Record
pattern blocks

Assessment in this Lesson

Assessment Expectation Assessed
Building Shapes
with Feedback Box
Student Activity Book
Pages 33–36
E2.
Describe the properties of two-dimensional shapes (e.g., number of sides, length of sides, number of corners).
E4.
Compose and decompose two-dimensional shapes using pattern blocks.
E5.
Justify visual and spatial reasoning by identifying the properties of shapes.