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Sky Defender
Created by Argraide
Updated October 27th, 2026
At a glance
- Staff pick
- Picked by the Argraide team
- Play mode
- 📱 Solo
- Format
- 🖼️ 2D
- Length
- ⏱ About 20 minutes
- Subject
- Math
- Grade
- 7
- Curriculum
- Ontario
- Curriculum codes
- B2.4B1.3
About this activity
An arcade defender where every shot is an integer decision: work out each drifting expression, fire only at the ones that fit the rule at the top (equal to, greater than, between) and let the rest pass.
What students learn
- Add and subtract integers, including subtracting a negative, using number-line moves (B2.4)
- Compare and order integer values against a target: equal to, greater than, and between two values (B1.3)
- Spot and correct the common slips: subtracting a negative the wrong way, adding sizes across signs, left is less
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