Are the following statements always true, sometimes true or never true?
How do you know?
Can you find examples or counter-examples for each one?
For the 'sometimes' cards can you explain when they are true? Or rewrite them so that they are always true or never true?
What about these more complex statements?
You could cut out the cards from this sheet (word, pdf) and arrange them in this grid.
Alternatively, you may like to try out your ideas using the interactivities below: