Home›Lesson Plans›Mathematics›Geometry · Grade 2

2D and 3D Shapes

Second graders learn that 2D shapes are flat while 3D shapes are solid and take up space, and sort familiar shapes into the two groups.

Grade 22D and 3D Shapes30 minutes1 class periodPlay-BasedExplicit teaching4 StandardsCommon Core
Start the Lesson
Assign or share this lesson
Share to Google Classroom Share to Microsoft Teams

Copy link works with Canvas, Schoology, Moodle and any other LMS — paste it in as a resource or assignment.

Lesson at a Glance

Everything you need before the bell rings

Learning Objectives

Students will be able to…

  • ✓Tell 2D from 3D.
  • ✓Name common examples.
  • ✓Describe flat vs solid.
  • ✓Sort shapes by type.
Essential Question

A circle you can draw, but a ball you can hold. What makes a shape flat or solid, and how do we sort them?

0
Lesson Phases
0
Vocabulary Terms
0
Standards Aligned
0
Interactive Task
Sort It · Interactive

Sort the Shapes

Project this and sort each shape into 2D or 3D — tap a shape, then tap whether it is flat or solid.

🔳 Sort each shape: 2D or 3D?Try it
◻️ 2D (flat)
🧊 3D (solid)
Tap a shape, then tap whether it is flat (2D) or solid (3D).
The Lesson · Play-Based Learning (Gather · Explore · Play · Reflect)

30 minutes, five moves

Tap any phase to open the teacher moves and student actions.

1

Hook — Flat or Solid?

5 min

A drawing of a ball and a real ball look alike. How are they different?

👩‍🏫 Teacher Moves

  • Show a circle and a ball.
  • Ask what is different.
  • Set the goal.

🎒 Student Actions

  • Think.
  • Share.
  • Get ready.
2

Use — Sort the Shapes

12 min

Students sort shapes into 2D and 3D.

👩‍🏫 Teacher Moves

  • Send students to Sort the Shapes.
  • Drop each shape.
  • Explain each choice.

🎒 Student Actions

  • Sort.
  • Say.
  • Explain.
3

Modify — Find Them Around You

13 min

Students match real objects to shapes.

👩‍🏫 Teacher Moves

  • Find a flat shape nearby.
  • Find a solid shape nearby.
  • Name each one.

🎒 Student Actions

  • Find.
  • Find.
  • Name.
4

Create — Shape Poster

15 min

Students make a 2D vs 3D poster.

👩‍🏫 Teacher Moves

  • Draw three flat shapes.
  • Draw three solid shapes.
  • Label each group.

🎒 Student Actions

  • Draw.
  • Draw.
  • Label.
5

Reflect — Takes Up Space

5 min

Students reflect on the difference.

👩‍🏫 Teacher Moves

  • What makes a shape 3D?
  • Is a square 2D or 3D?
  • Complete the exit ticket.

🎒 Student Actions

  • Say it.
  • Say it.
  • Complete the exit ticket.
Standards Alignment

Built to the standards you report on

Aligned to the Common Core State Standards for Mathematics (Grade 2).

CCSS
2.G.A.1

Recognize and draw shapes having specified attributes, such as a given number of angles or faces.

CCSS
K.G.A.3

Identify shapes as two-dimensional (flat) or three-dimensional (solid).

CCSS
K.G.A.2

Correctly name shapes regardless of their orientation or size.

CCSS
MP.7

Look for and make use of structure.

Differentiation

One lesson, every learner

Multilingual Learners

ELL / EMERGING READERS
  • Shape + real-object cards.
  • Sentence frame: “A ___ is flat / solid.”
  • Sort two shapes at a time.

Support & Access

IEP / 504
  • Start with circle vs ball.
  • Handle real solid shapes.
  • Sort 2D fully before 3D.

Stretch & Extend

GIFTED / EARLY FINISHERS
  • Count faces, edges, and vertices of 3D shapes.
  • Match each 3D shape to its 2D faces.
  • Find 3D shapes around the classroom.
Materials

What to gather

  • 📽️Projector / board
  • 🧊Solid shape models
  • 💻Sort the Shapes
  • 🔳2D shape cards
  • ✏️Crayons
  • 🎫Exit-ticket slips
Vocabulary

Key terms — hover for a quick definition

2D shapea flat shape with length and width, like a circle3D shapea solid shape that takes up space, like a ballflathaving no thickness; two-dimensionalsolidtaking up space in all directions; three-dimensionalfacea flat surface of a 3D shapesideone straight edge of a 2D shapecubea 3D shape with six square facesspherea perfectly round 3D shape, like a ball
Evaluate

Exit Ticket

Preview the three formative checks. Tap “Sample answer” to see what mastery looks like — hide them before you print for students.

QUESTION 1
What is the difference between a 2D and a 3D shape?
A 2D shape is flat (length and width); a 3D shape is solid and takes up space.
QUESTION 2
Name one 2D shape and one 3D shape.
For example, a circle (2D) and a sphere (3D).
QUESTION 3
Is a cube 2D or 3D, and why?
3D, because it is solid and takes up space, with faces, edges, and corners.

Create: a shape poster.

Have students draw three flat (2D) shapes and three solid (3D) shapes and label each group. A printable 2D-and-3D-shapes worksheet is in the Mathematics library.

Study · Flashcards

Study the key terms

Tap a card to flip it, then rate whether you knew it. Built from this lesson’s vocabulary.

🃏 2D and 3D ShapesFlip
Card 1
Term
Tap to flip →
Meaning
0

Nice work!

Practice · Quiz

Check your understanding

A quick self-check with instant feedback, drawn from this lesson’s key terms.

📝 2D and 3D ShapesQuiz
Score: 0
1 / 6
Question 1
0%

Nice work!

Practice · Worksheet

Printable worksheet

A print-and-go review sheet with a built-in answer key. Tap “Show answer key” to reveal answers, or print the clean version for students.

🖨️ 2D and 3D ShapesPrint
Name: ________________________
Date: ____________

Part A · Write the word that matches each meaning

Word bank: 2D shape, 3D shape, cube, face, flat, side, solid, sphere
  1. taking up space in all directions; three-dimensional
  2. a flat surface of a 3D shape
  3. a 3D shape with six square faces
  4. a perfectly round 3D shape, like a ball
  5. having no thickness; two-dimensional
  6. one straight edge of a 2D shape
  7. a flat shape with length and width, like a circle
  8. a solid shape that takes up space, like a ball

Part B · Show what you learned

  1. What is the difference between a 2D and a 3D shape?
  2. Name one 2D shape and one 3D shape.
  3. Is a cube 2D or 3D, and why?
Answer key — Part A: 1) solid · 2) face · 3) cube · 4) sphere · 5) flat · 6) side · 7) 2D shape · 8) 3D shape
Part B: 1) A 2D shape is flat (length and width); a 3D shape is solid and takes up space. 2) For example, a circle (2D) and a sphere (3D). 3) 3D, because it is solid and takes up space, with faces, edges, and corners.