Which of the diagrams above show:
a)The net of a cube,
b)The net of a dice (opposite numbers adding up to seven)?
Topics: Starter  Shape (3D)  Number  Problem Solving
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Previous Day  This starter is for 25 March  Next Day
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Notes for Teacher: The five questions will show on an infinite loop (if you have Flash installed) so that it can be playing as the students enter the room. If there is any doubt about a net you can click the pause button then print out the net for cutting out and folding.
There is a printable worksheet to go with this activity.
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Teacher, do your students have access to computers such as tablets, iPads or Laptops? This page was really designed for projection on a whiteboard but if you really want the students to have access to it here is a concise URL for a version of this page without the comments: Transum.org/go/?Start=March25 However it would be better to assign one of the student interactive activities below. 

Here is the URL which will take them to the Dice Net Challenge.
Here is the URL which will take them to the Net Or Not activity.
Of the nets above that produced dice, which were righthanded and which were lefthanded?
Lefthanded Dice 
Righthanded Dice 
A race between 12 snails. Which snail is most likely to win? This is the students' version of the race simulation.
Choose your own numbers for your bingo card. The caller uses two dice and adds the numbers together.
Throw two dice and multiply the scores. Investigate the different products you can obtain. What about adding? What about using three dice?
Drag the numbers onto the net so that when it is folded to form a cube numbers on opposite faces add up to prime numbers.
An online board game for two players involving prime and square numbers and making choices.