Plank Tic-Tac-Toe

Two players face each other in a plank and play tic-tac-toe by placing bean bags with one hand on a grid drawn on the floor. It builds isometric core and arm strength while students think through their moves.

How to play

1. Draw 3x3 grids about 60 cm (2 ft) wide with chalk (or tape them indoors), one per pair. Each player has 3 bean bags of one color.
2. Players get into a high plank head to head with the grid between them. Practice the position for 1 minute: straight body, hands under shoulders.
3. Taking turns, each player places a bean bag in a square with one hand without dropping their knees. Once all 6 bags are down, players move their own bags to an open square until someone gets three in a row.
4. Each game lasts up to 40 seconds; if no one wins, it is a tie. Then rest for 20 seconds on your knees.
5. After each game, the winner moves up one grid toward the "king's court" and the other player moves down one, so everyone gets new opponents.
6. Play about 10 games (10 min), and at the end each student shares how many seconds they can hold a good plank.

Rules

• If your knees touch down or your hips pop up high, you lose your turn.
• Move only one bean bag per turn, with one hand.
• Take the full rest between games.
• If your wrists or back hurt, switch to a forearm plank or a knee plank.

Variations

Adaptations

• Limited mobility: the student plays seated at a table or lap tray, lifting a light medicine ball before each move.
• Visual impairment: use a raised grid made with ropes and bean bags with different textures.
• Different fitness levels: each student picks a high, forearm or knee plank, and every game counts the same.

Learning goals

• Hold a stable plank with good body alignment.
• Make quick decisions while sustaining effort.
• Accept the result and switch opponents with good sportsmanship.

Equipment for a class of 25

• chalk: 6
• bean bags: 78

Teacher tip

Circulate and fix sagging hips, the most common mistake. If the outdoor surface is rough, give students a mat or move into the gym.

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