This is an ideal active learning strategy which can be used by students after they have watched a clip, read a text, or as part of a revision game.
Students work in pairs. They watch a clip, or read a text. They are then given either/both:

1.’Summary cards’ These summarise key points from the text/clip, some of which are true and some of which are false: e.g.

•The left ventricle supplies blood to the lung
•Heart rate is measured in beats per minute, and if you are very fit your heart rate will be lower than average.

2.’Consequences cards’ which state consequences of the facts given in the text.  These consequences are not actually stated in the text itself.  Again some are true and some false E.g.

•If you blocked the left ventricle no blood would get to your head.
•Furring of the arteries would raise a person’s blood pressure.
Firstly, pairs of students decide which cards are true and which are false.
They then decide why the “false”statements are incorrect.
They re-write the false statements to make them true.
They can compare their answers and new statements with another pair and be challenged to produce an even better answer.
The activity can be differentiated for different student pairs.