Work together to build and protect a town that is under attack by giant robots. Choose to upgrade the homes within the town and grow the population, strengthen the town walls or actively attack the robots.

Use this game to reinforce the skill of adding six when mentally adding simple sums to 15. Students will develop fluency with +6 facts as they work together to protect the town. Each correct answer powers up their defences or strengthens the town’s population, encouraging collaboration and repeated practise with early addition strategies.

Will your students defend the town and keep the robots at bay?

Key Learning Outcomes:

• ✅ Mentally add six to numbers within 15
• ✅ Strengthen recall of basic number facts
• ✅ Build fluency and confidence with early addition strategies
• ✅ Develop number sense and logical reasoning
• ✅ Engage in cooperative gameplay that reinforces maths fluency

How to Play:

1. Students are presented with an equation involving adding six to a number.
2. They must solve the equation and select the correct answer.
3. Each correct answer strengthens the town—upgrading homes, building walls or attacking robots.
4. The game continues through a series of mental addition problems involving +6.
5. Students work together to protect the town and defeat the robot invasion!

Ideas for Classroom Use:

• 💡 Use during number fluency lessons or mental maths rotations
• 💡 Great for Foundation to Year 1 students learning +6 facts through fun repetition
• 💡 Pair with number lines, counters or ten frames for added visual support
• 💡 Replay to reinforce memory and confidence with targeted number facts

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 to suit individual, paired or group play
• 💛 Send the QR code home so students can practise fluency with addition facts in a fun format

Let’s Defend – Mental Maths: Adding 6 helps students build fluency and teamwork while developing confidence with one of the most important early number facts!