Free Grade 3 Volume of Spheres Lesson Plans
Free Grade 3 lesson plans for Volume of Spheres: 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
Stretch
30 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- UnderstandExplain volume of spheres
Explain volume of spheres accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate volume of spheres
Calculate volume of spheres accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare volume of spheres
Compare volume of spheres accurately in a familiar context.
Assessed by: Exit ticket of four short items
- EvaluateJustify volume of spheres
Justify volume of spheres 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 Volume of Spheres 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 10 cm × 7 cm × 5 cm.[1]
- 2.Find the volume of a cuboid 10 cm × 9 cm × 9 cm.[1]
- 3.Find the volume of a cuboid 5 cm × 9 cm × 2 cm.[1]
- 4.Find the volume of a cuboid 10 cm × 7 cm × 3 cm.[1]
- 5.Find the volume of a cuboid 2 cm × 8 cm × 7 cm.[2]
- 6.Find the volume of a cuboid 4 cm × 6 cm × 3 cm.[2]
- 7.Find the volume of a cuboid 8 cm × 3 cm × 10 cm.[2]
- 8.Find the volume of a cuboid 5 cm × 5 cm × 2 cm.[2]
- 9.Find the surface area of a cuboid 7 cm × 9 cm × 7 cm.[3]
- 10.Find the surface area of a cuboid 6 cm × 8 cm × 2 cm.[3]
- 11.Find the surface area of a cuboid 3 cm × 6 cm × 8 cm.[3]
- 12.Find the surface area of a cuboid 10 cm × 5 cm × 10 cm.[3]
Show answers and working
1. 350 cm³
Volume = length × width × height. 10 × 7 × 5 = 350 cm³.
2. 810 cm³
Volume = length × width × height. 10 × 9 × 9 = 810 cm³.
3. 90 cm³
Volume = length × width × height. 5 × 9 × 2 = 90 cm³.
4. 210 cm³
Volume = length × width × height. 10 × 7 × 3 = 210 cm³.
5. 112 cm³
Volume = length × width × height. 2 × 8 × 7 = 112 cm³.
6. 72 cm³
Volume = length × width × height. 4 × 6 × 3 = 72 cm³.
7. 240 cm³
Volume = length × width × height. 8 × 3 × 10 = 240 cm³.
8. 50 cm³
Volume = length × width × height. 5 × 5 × 2 = 50 cm³.
9. 350 cm²
Three pairs of faces: 63, 63, 49. 2 × (63 + 63 + 49) = 350 cm².
10. 152 cm²
Three pairs of faces: 48, 16, 12. 2 × (48 + 16 + 12) = 152 cm².
11. 180 cm²
Three pairs of faces: 18, 48, 24. 2 × (18 + 48 + 24) = 180 cm².
12. 400 cm²
Three pairs of faces: 50, 50, 100. 2 × (50 + 50 + 100) = 400 cm².
Worked examples
Find the volume of a cuboid 9 cm × 6 cm × 8 cm.
- Volume = length × width × height.
- 9 × 6 × 8 = 432 cm³.
- Answer: 432 cm³
Find the volume of a cuboid 7 cm × 6 cm × 9 cm.
- Volume = length × width × height.
- 7 × 6 × 9 = 378 cm³.
- Answer: 378 cm³
Find the surface area of a cuboid 3 cm × 2 cm × 7 cm.
- Three pairs of faces: 6, 14, 21.
- 2 × (6 + 14 + 21) = 82 cm².
- Answer: 82 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 Volume of Spheres 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 Volume of Cylinders, Volume of Prisms, Perimeter and Area. 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 Volume of Spheres?
- Move on to Angles, 2D Shapes, Perimeter and Area, Transformations, which build directly on this idea.
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