Free Grade 3 Introducing Surface Area Lesson Plans
Free Grade 3 lesson plans for Introducing Surface Area: 12 real questions with a full answer key and worked solutions. Volume is how much space a 3D shape takes up. For a cuboid, multiply length × width × height. Surface area is the total area of all faces.
Free
Higher
25 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- RememberIdentify introducing surface area
Identify introducing surface area accurately in a familiar context.
Assessed by: Exit ticket of four short items
- UnderstandExplain introducing surface area
Explain introducing surface area accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate introducing surface area
Calculate introducing surface area accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare introducing surface area
Compare introducing surface area accurately in a familiar context.
Assessed by: Exit ticket of four short items
Prerequisites
Close these gaps first — each has its own free lesson, worksheet and quiz.
How Introducing Surface Area works
Volume is how much space a 3D shape takes up. For a cuboid, multiply length × width × height. Surface area is the total area of all faces.
12 practice questions
Easy to hard, 24 marks in total. Try them first, then open the answers.
- 1.Find the volume of a cuboid 7 cm × 6 cm × 6 cm.[1]
- 2.Find the volume of a cuboid 3 cm × 8 cm × 9 cm.[1]
- 3.Find the volume of a cuboid 10 cm × 9 cm × 9 cm.[1]
- 4.Find the volume of a cuboid 10 cm × 3 cm × 3 cm.[1]
- 5.Find the volume of a cuboid 6 cm × 3 cm × 4 cm.[2]
- 6.Find the volume of a cuboid 10 cm × 6 cm × 5 cm.[2]
- 7.Find the volume of a cuboid 7 cm × 4 cm × 2 cm.[2]
- 8.Find the volume of a cuboid 3 cm × 8 cm × 2 cm.[2]
- 9.Find the surface area of a cuboid 5 cm × 4 cm × 9 cm.[3]
- 10.Find the surface area of a cuboid 7 cm × 8 cm × 6 cm.[3]
- 11.Find the surface area of a cuboid 6 cm × 10 cm × 4 cm.[3]
- 12.Find the surface area of a cuboid 3 cm × 3 cm × 8 cm.[3]
Show answers and working
1. 252 cm³
Volume = length × width × height. 7 × 6 × 6 = 252 cm³.
2. 216 cm³
Volume = length × width × height. 3 × 8 × 9 = 216 cm³.
3. 810 cm³
Volume = length × width × height. 10 × 9 × 9 = 810 cm³.
4. 90 cm³
Volume = length × width × height. 10 × 3 × 3 = 90 cm³.
5. 72 cm³
Volume = length × width × height. 6 × 3 × 4 = 72 cm³.
6. 300 cm³
Volume = length × width × height. 10 × 6 × 5 = 300 cm³.
7. 56 cm³
Volume = length × width × height. 7 × 4 × 2 = 56 cm³.
8. 48 cm³
Volume = length × width × height. 3 × 8 × 2 = 48 cm³.
9. 202 cm²
Three pairs of faces: 20, 36, 45. 2 × (20 + 36 + 45) = 202 cm².
10. 292 cm²
Three pairs of faces: 56, 48, 42. 2 × (56 + 48 + 42) = 292 cm².
11. 248 cm²
Three pairs of faces: 60, 40, 24. 2 × (60 + 40 + 24) = 248 cm².
12. 114 cm²
Three pairs of faces: 9, 24, 24. 2 × (9 + 24 + 24) = 114 cm².
Worked examples
Find the volume of a cuboid 4 cm × 2 cm × 5 cm.
- Volume = length × width × height.
- 4 × 2 × 5 = 40 cm³.
- Answer: 40 cm³
Find the volume of a cuboid 10 cm × 7 cm × 3 cm.
- Volume = length × width × height.
- 10 × 7 × 3 = 210 cm³.
- Answer: 210 cm³
Find the surface area of a cuboid 6 cm × 3 cm × 8 cm.
- Three pairs of faces: 18, 24, 48.
- 2 × (18 + 24 + 48) = 180 cm².
- Answer: 180 cm²
Interactive practice
Free, no account required — answer on screen or print it.
Common mistakes
What learners typically get wrong, and how to fix it.
Adds the dimensions instead of multiplying.
Correction: Volume = l × w × h.
Counts only three faces for surface area.
Correction: A cuboid has six faces — three matching pairs.
Teacher tips
- · Build cuboids from cubes before using the formula.
Parent tips
- · Work out how many sugar cubes fit in a box.
Real-life applications
- · Filling a fish tank, wrapping a present.
Assessment objectives
How mastery is evidenced, and which standards it maps to.
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Frequently asked
- Is this Grade 3 Introducing Surface Area lesson plan really free?
- Yes. Every lesson plans on FreeMathWorksheet is free to use, print and share — no account, no paywall and no watermark.
- What should a learner already know before this?
- Start with Nets. Each one has its own free lesson, worksheet and quiz.
- How is the lesson plan sequenced?
- Recognition first, then understanding, application, reasoning and finally mastery — the same ladder used across every free resource on the platform.
- What comes next after Introducing Surface Area?
- Move on to Working with Surface Area, Surface Area in Context, Nets, Volume of Prisms, which build directly on this idea.
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