Just A Minute
The one minute challenge - could you tell when one minute has passed?
Students are to find a space and focus on a blind spot. Explain to them that they will need to estimate when one minute has passed from the moment you say.
Students are to identify 'one minute' by raising their hands when they think one minute has passed.
You will need to re-emphasise the focus required.
Encourage them to make their own decision and not be swayed by others.
Asking students to close their eyes gives this a different twist.