The robots are back and stronger than ever! In this high-energy digital game, students must work together to protect a vulnerable town by solving mass conversion challenges. Each correct answer helps them rebuild homes, strengthen the walls, or launch an attack to push back the invading robots.

Students will convert mass values from kilograms (kg) to grams (g), and apply that understanding to word problems that challenge them to think critically and mathematically. With every correct response, they’ll make strategic decisions to defend and grow their town before the robots close in!

This game supports deep understanding of metric conversions and gives students the chance to apply maths in a fast-paced, purposeful context.

Key Learning Outcomes:

• ✅ Convert mass values from kilograms (kg) to grams (g)
• ✅ Interpret and solve word problems involving mass conversions
• ✅ Strengthen understanding of metric units and place value relationships
• ✅ Apply multiplication skills with powers of ten
• ✅ Engage in decision-based learning through interactive gameplay

How to Play:

1. Students are presented with a mass conversion question or word problem involving kilograms and grams.
2. A correct answer earns a reward choice: grow the town, fortify the walls, or attack the incoming robots.
3. Incorrect answers give the robots a chance to get closer to the town.
4. The game continues through a series of questions and applied scenarios.
5. Students work to hold off the final robot wave and keep their town standing!

Ideas for Classroom Use:

• 💡 Use during measurement units focused on mass conversions and problem solving
• 💡 Great for Year 5–6 students working on multi-step conversion reasoning
• 💡 Add to rotations as a fun fluency-building tool that connects to real-world context
• 💡 Follow up with written word problems or practical activities involving 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 play as a homework or revision task

Let’s Defend – Mass Conversions: Kilograms to Grams helps students master metric conversions while building teamwork, resilience, and quick-thinking skills under pressure.