Wrong Weights: Grams, Kilograms & Tonnes Worksheets is a fun and practical resource designed to help students develop a strong understanding of mass and unit conversions. Through engaging, real-world examples, students will identify errors in weight labels and correct them by converting between grams, kilograms and tonnes. This resource encourages mathematical reasoning, critical thinking and hands-on exploration, making it a great addition to your measurement toolkit.

Each worksheet features familiar objects such as animals, vehicles and carnival rides with intentionally incorrect weight labels. Students must identify the mistakes and rewrite each mass using a more appropriate unit of measurement. They’ll also complete conversion tables and explore how different units apply to real-life items. The inclusion of a hands-on weighing task using classroom objects helps bridge the gap between abstract conversion skills and tangible understanding.

This resource is ideal for small group work, maths rotations, or individual reinforcement tasks. With a focus on both written and practical tasks, it caters to a variety of learning styles and provides opportunities for consolidation, discussion and extension.

Key Learning Outcomes:

• ✅ Convert between grams, kilograms and tonnes
• ✅ Recognise appropriate units of mass for different items
• ✅ Identify and correct common mass measurement errors
• ✅ Apply mass concepts to real-life and classroom contexts
• ✅ Strengthen mathematical reasoning and unit fluency

What’s Included:

• Worksheets featuring incorrectly labelled masses for students to correct
• Conversion tables for practise with grams, kilograms and tonnes
• Question prompts encouraging real-world application and critical thinking
• Hands-on activity section for weighing and converting classroom objects

Materials Needed:

• Printed worksheets
• Pencils or pens
• Classroom scales or measuring tools
• Optional: small items from around the classroom to weigh (books, water bottles, glue sticks, etc.)

How to Use:

• Begin by reviewing mass units and their real-life applications
• Students work through each worksheet to identify and correct measurement errors
• Complete conversion tables to reinforce understanding between units
• List five real-life items and assign the appropriate unit (grams, kilograms or tonnes)
• Weigh three classroom items and convert their mass into different units

Ideas for Classroom Use:

• 💡 Use as a follow-up task after a hands-on measurement investigation
• 💡 Set up as a maths rotation or extension station
• 💡 Incorporate into a broader unit on measurement and data
• 💡 Encourage partner discussions around reasoning for correcting mass errors

Top Teacher Tips:

• 💛 Use real objects and measuring tools to give students concrete experiences with mass
• 💛 Model unit conversions and estimation strategies on the board before independent work
• 💛 Display anchor charts with examples of items measured in grams, kilograms and tonnes
• 💛 Have students create their own “wrong weight” scenarios as a consolidation or homework task

Wrong Weights: Grams, Kilograms & Tonnes Worksheets helps students build fluency and confidence with mass conversions, all while solving fun, relatable problems. It’s an excellent way to connect mathematical thinking with real-life contexts and support lasting understanding.