Grudgeball — the classic whole-class review game for the whiteboard

What is Grudgeball?

Grudgeball (also spelled Grudge Ball) is a fast, competitive whole-class review game. Teams answer your questions to rub out their rivals' X's, then take a bonus shot at a bin or hoop for extra points. It's a brilliant no-prep way to revise any topic before a test — and this digital version runs straight on your whiteboard, free.

How to play Grudgeball

1. Split the class into 3–6 teams. Put each team on the board with 10 X's to start.
2. Show a question. The team in play answers (on a mini-whiteboard or aloud).
3. Correct? They rub out two X's — both from one rival, or one each from two teams.
4. They then take a bonus shot at the bin: a made shot wins back or steals extra X's (further line = more X's).
5. Play passes to the next team. Keep going until time's up or you run out of questions.
6. The team with the most X's left on the board wins.

Why play the digital version

• Free, with no account needed to play.
• No slides to build — it projects straight onto the whiteboard.
• Ready-made question banks, or generate your own set on any topic.
• The scoreboard tracks every team's X's and the grudges for you.

Use it for any subject

Grudgeball works for any review content and any age from primary upwards — English, maths, science, history, geography, languages, or general knowledge. Swap in your own questions and the same game fits every lesson.

Grudgeball FAQ

Is Grudgeball free?

Yes — it's one of Sage Teachers' free apps. No subscription is needed to play.

How many teams can play?

It works best with 3 to 6 teams.

Do students need their own devices?

No. It's a whole-class game run from the front — one board, one ball, one bin.

What's the difference between Grudgeball and Trashketball?

Both involve shooting for points, but in Grudgeball teams take X's off each other — the "grudge" — which makes it more competitive.

Is it spelled Grudgeball or Grudge Ball?

Both — it's the same game either way.

Related apps

Like whole-class games run from one screen? The Big Ten and Behind the Tiles work the same no-device way — and Spin the Wheel picks which team goes first.