A simple team game, played ideally with a fairly short text.
In the example here (see image above and live example below) I have chosen to affect 1 in 3 spaces in the text (i.e. 2 in 3 spaces between words are already present) and students have 48 more spaces to find.
Divide the class into 2 teams and select a member from each team in turn to play.
The rules: