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Primary 7 - 11 A: Place value, ordering and rounding B: Properties of numbers & number sequences C: Fractions, decimals & percentages, ratio & proportion D: Mental calculation strategies (+ and -) E: Pencil & paper procedures (+ and -) F: Understanding multiplication & division G: Rapid recall of multiplication & division facts H: Mental calculation strategies (x and divide) I: Pencil & paper procedures (x and divide) J: Using a calculator K: Checking results of calculations L: Solving problems: making decisions M: Reasoning about numbers or shapes N: Problems involving 'real life', money or measures O: Handling data P: Measures Q: Shape and space Secondary 11 - 16 A: Applying mathematics and solving problems B: Place value, ordering and rounding C: Integers, powers and roots D: Fractions, decimals, percentages, ratio and proportion E: Number operations and the relationships between them F: Mental methods and rapid recall of number facts G: Calculations: written methods H: Calculations: calculator methods I: Calculations: checking results J: Equations, formulae and identities K: Sequences, functions and graphs L: Geometrical reasoning: lines, angles and shapes M: Transformations N: Coordinates O: Construction & loci P: Measures and mensuration Q: Statistics R: Probability

The Monty Hall Problem The Monty Hall problem is a probability puzzle based on an American television game show. The host of the show was Monty Hall. Contestants were faced with choosing to open one of three doors. Behind one of the doors was a car, behind each of the other two was a goat. The contestant chose a door and then Monty Hall, who knew what was behind each door, opened one of the other two doors to reveal a goat. The contestant then had to decide whether to stick with his or her first choice or switch to the other closed door. Is it better to switch or stick? Or doesn't it matter? What are the chances of winning the car? The problem created a great deal of argument and discussion. Timer: useful for timing tests and other timed activities. If you would like to personalise how you use Active Maths resources have a look at Protopage. Set up your own start pages with links to the resources you use most or want to use next week. Have a look at Bash Street School's Protopage page...click here. It's pretty good!