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In this activity, learners play a game similar to Tic-Tac-Toe. In this version, learners try NOT to get three-in-a-row. The player who gets three-in-a-row first loses! Challenge learners to play other well-known games with the rules reversed. [Activity is publicly available through a web crawler capture on]

Quick Guide

Preparation Time:
Under 5 minutes

Learning Time:
Under 5 minutes

Estimated Materials Cost:
free per group of students

Age Range:
Ages 6 - 11

Resource Types:
Activity, Game

English, Spanish

Materials List (per group of students)

  • paper
  • pencil


  • Mathematics
    • Algebra
    • Data Analysis and Probability
      • Data Analysis
    • Reasoning and Proof
    • Representation
  • The Nature of Technology
    • The Design Process
      • Problem Solving

Informal Categories

  • Games


To use this activity, learners need to:

  • see
  • touch

Learning styles supported:

  • Involves hands-on or lab activities


Foreign language versions of this resource:

This resource is part of:

Access Rights:

  • Free access



  • All rights reserved, WGBH Educational Foundation, 2002

Funding Sources:

  • National Science Foundation, 0229796
  • Corporation for Public Broadcasting
  • The Arthur Vining Davis Foundation
  • PBS