Shape Up with Math: A 2D & 3D Under the Sea Adventure!

Math Grades 1st Grade 3:18 Video
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Lesson Description

Dive into the ocean and discover 2D and 3D shapes with this fun, active math lesson! We'll use tally marks, ten frames, and more to practice our geometry skills.

Video Resource

2D or 3D Shapes: Under the Sea Math Brain Break

Move and Groove Math

Duration: 3:18
Watch on YouTube

Key Concepts

  • 2D Shapes (flat shapes like circles, squares, triangles)
  • 3D Shapes (solid shapes like cubes, spheres, cones)
  • Counting and representing numbers with tally marks, ten frames, dots and dice

Learning Objectives

  • Students will be able to identify and name common 2D shapes.
  • Students will be able to identify and name common 3D shapes.
  • Students will be able to count and represent numbers using tally marks, ten frames, dots and dice.

Educator Instructions

  • Introduction (5 mins)
    Begin by asking students what they already know about shapes. Discuss the difference between flat (2D) and solid (3D) shapes. Show examples of each.
  • Video Time: Under the Sea Shapes (10 mins)
    Watch the '2D or 3D Shapes: Under the Sea Math Brain Break' video. Encourage students to participate actively during the video by doing the movements and calling out the shapes.
  • Shape Sort (10 mins)
    Divide students into small groups. Give each group a set of shape cards (pictures of 2D and 3D shapes). Have them sort the shapes into two categories: 2D and 3D.
  • Representing Numbers (10 mins)
    Using the tally marks, ten frames, dots and dice from the video, practice representing different numbers. For example, show the number 7 using tally marks, and then using a ten frame. Have students work together to show different numbers.
  • Wrap-up (5 mins)
    Review the shapes and number representations learned. Ask students to share their favorite shape and why.

Interactive Exercises

  • Shape Scavenger Hunt
    Have students look around the classroom for examples of 2D and 3D shapes. They can draw the objects they find and label the shapes.
  • Build a Shape
    Provide students with materials like straws, pipe cleaners, or playdough. Have them build different 2D and 3D shapes.

Discussion Questions

  • What is the difference between a 2D and a 3D shape?
  • Can you name some real-world objects that are the same shape as a cube?
  • How can we show numbers using tally marks?
  • Can you name some real-world objects that are the same shape as a circle?
  • Why do we use ten frames?

Skills Developed

  • Shape recognition
  • Spatial reasoning
  • Counting and Number Representation

Multiple Choice Questions

Question 1:

Which shape is flat like a pancake?

Correct Answer: Circle

Question 2:

Which shape is like a ball?

Correct Answer: Sphere

Question 3:

How many sides does a triangle have?

Correct Answer: 4

Question 4:

Which of these is a 3D shape?

Correct Answer: Cube

Question 5:

What shape is like a box?

Correct Answer: Cube

Question 6:

Which tool uses lines to show how many?

Correct Answer: Tally Marks

Question 7:

What is a flat shape called?

Correct Answer: 2D shape

Question 8:

What shape is like a party hat?

Correct Answer: Cone

Question 9:

Which tool has ten spaces to show numbers?

Correct Answer: Ten Frame

Question 10:

If you roll one dice, what is the highest number you could roll?

Correct Answer: 6

Fill in the Blank Questions

Question 1:

A square has ____ sides.

Correct Answer: 4

Question 2:

A ______ is a 3D shape that looks like a ball.

Correct Answer: sphere

Question 3:

We use ______ _____ to show how many.

Correct Answer: tally marks

Question 4:

A rectangle is a ____ shape.

Correct Answer: 2D

Question 5:

A ______ is a 3D shape that has a flat, round base and comes to a point.

Correct Answer: cone

Question 6:

A _____ ____ helps us see numbers to 10.

Correct Answer: ten frame

Question 7:

A cube has _____ sides.

Correct Answer: 6

Question 8:

Dots can show how many, just like ____ ____.

Correct Answer: tally marks

Question 9:

Rolling ____ can show us different numbers to add.

Correct Answer: dice

Question 10:

A shape that is solid is a ____ shape.

Correct Answer: 3D

Educational Standards

1.G.A.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. 1.G.A.2:Compose two-dimensional shapes (rectangles, squares, trapezoids, triangles, half-circles, and quarter-circles) or three-dimensional shapes (cubes, right rectangular prisms, right circular cones, and right circular cylinders) to create a composite shape, and compose new shapes from the composite shape. (Students do not need to learn formal names such as "right rectangular prism.") CCSS.Math.Content.1.OA.C.6:Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 - 4 = 13 - 3 - 1 = 10 - 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 - 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).

Teaching Materials

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