Grade 5 Math Unit Assessment: Volume of Cuboids (16 Marks)

Question Types & Suggested Use

Exit tickets in lessons 1 and 3. Worksheet Parts A–E with the answer key. Unit Assessment (16 marks). Performance task (rubric): "Design a Box" — design a box with a given volume for a product and explain the measurements.

Skills Assessed

• Explain that volume is the amount of space inside or taken up by a 3D shape.
• Find the volume of a cuboid by counting unit cubes in layers.
• Use the formula V = l × w × h and write the answer in cubic units (cm³, m³).
• Find a missing length when the volume and two lengths are known.
• Find the volume of a shape made from two cuboids and solve real-life problems.

How to Administer

• Give at the end of the unit (or as a pre-test before teaching).
• Allow about 35 minutes. Students work alone.
• Mark with the answer key; use the score guide to decide who needs re-teaching or a challenge.

Differentiation

Support: Keep cubes available for every question. Challenge: Find all the cuboids with a volume of 36 cm³ (whole-number edges). English language learners: Point to length, width and height on a real box while saying the words.

Follow-Up Activities

• Box Detectives (12 minutes, Pairs): Estimate which box has the biggest volume. Measure length, width and height to the nearest cm.
• Same Volume, Different Box (10 minutes, Pairs): Use exactly 24 cubes to build a cuboid. Record l, w and h. Build a different cuboid with the same 24 cubes.
• Volume Bingo (8 minutes, Whole class): Students write 9 numbers from this list in their grid: 6, 8, 12, 18, 20, 24, 27, 30, 36, 40, 48, 60. Call out a cuboid, e.g. "3 × 2 × 4".

Teacher Tips

Let students hold a 1 cm cube: "This is 1 cm³ — about the size of a sugar cube." Show 1 m³ with three meter sticks and tape in a corner of the room — students are always surprised how big it is.

What's Included

• 16-mark unit assessment (PDF + editable DOCX)
• Part A: Count and Calculate (4 marks)
• Part B: Facts (4 marks)
• Part C: Missing Lengths (4 marks)
• Part D: Problem Solving (4 marks)
• Answer key with marking notes and a score guide (PDF)

Additional Files

• Grade 5 Math Unit Assessment: Volume of Cuboids (16 Marks) (DOCX)
• Answer Key (PDF)

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