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Treasure Heist

Created by Argraide
Updated October 3rd, 2026
Treasure Heist

At a glance

Play mode
👥 Group
Format
🖼️ 2D
Length
⏱ About 20 minutes
Subject
Math
Grade
3
Curriculum
Ontario
Curriculum codes
B2.5
B2.3

About this activity

A whole-class pirate-vault game. Every phone types or builds each answer; a right answer opens one of three chests whose luck changes game gold only. The big screen shows the vault board and the heist moments. Four phases, each taught by Captain Marlo first: make a ten, count up, regroup, estimate and solve.

What students learn

  • Add whole numbers that add up to no more than 1000 by making a friendly ten or hundred
  • Subtract whole numbers up to 1000 by counting up from the smaller number
  • Add and subtract with regrouping, building the answer with place-value blocks
  • Estimate to compare results, then solve word problems and missing-number equations

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