Join the defence team and protect your town from a robot invasion in this high-stakes measurement game. As students work together to strengthen walls, upgrade buildings, or fight off giant robots, they’ll need to decide which unit of measurement is most appropriate for different objects—grams or kilograms.

Throughout the game, students are presented with a series of real-world objects. For each one, they must use their reasoning skills to determine whether its mass would typically be measured in grams or kilograms. This fun, fast-paced environment helps them solidify their understanding of metric units through repetition, teamwork and real-world context.

Let’s Defend – Units of Measurement: Grams or Kilograms? is ideal for reinforcing learning during your mass unit and is suitable for Years 2–4. Whether played in pairs, small groups or as a whole class, it encourages students to apply their measurement knowledge while building a thriving digital town together.

Key Learning Outcomes:

• ✅ Identify the appropriate unit of mass (grams or kilograms) for various objects
• ✅ Strengthen understanding of metric measurement systems
• ✅ Build reasoning skills using real-world mass comparisons
• ✅ Reinforce vocabulary and unit conventions through repetition
• ✅ Engage in teamwork-based interactive gameplay

How to Play:

1. Students are shown a picture or description of an object.
2. They must decide if its mass should be measured in grams or kilograms.
3. Each correct answer contributes to building or defending the town.
4. Incorrect answers may slow progress, so careful thinking is required!
5. The game ends when all questions are answered and the town is secure.

Ideas for Classroom Use:

• 💡 Use during maths units on mass and measurement systems
• 💡 Ideal for Years 2–4 as a consolidation task or revision activity
• 💡 Add to maths rotations for hands-on, cooperative learning
• 💡 Follow up with a sorting task using real classroom objects

Top Teacher Tips:

• 💛 Let students personalise their experience by choosing from six characters before the game begins
• 💛 Select the number of players or teams at the start of the game to suit individual, paired or group play
• 💛 Send the QR code home for students to practise identifying appropriate units of measurement in their daily environment

Let’s Defend – Units of Measurement: Grams or Kilograms? turns essential measurement concepts into a collaborative and exciting digital challenge for young learners.