60Secondary Teacher Big Button Pagehttp://nrich.maths.org/8684en 2012 http://nrich.maths.org/public/terms.phpProbability - It's Deadly Serious!http://nrich.maths.org/12257Wed, 01 Dec 1999 00:00:01 +0000Introductory VideoAn introductory video to the Probability and Evidence collectionhttp://nrich.maths.org/12241Wed, 01 Dec 1999 00:00:01 +0000Matching CriminalsDNA profiling is an invaluable tool for the police. However, when it comes to probability, things aren't always as straightforward as they seem.http://nrich.maths.org/12215Wed, 01 Dec 1999 00:00:01 +0000The ELISA TestIn 1% of cases, an HIV test gives a positive result for someone who is HIV negative. How likely is it that someone who tests positive has HIV?http://nrich.maths.org/12178Wed, 01 Dec 1999 00:00:01 +0000Do Rare Events Happen?I'd be very surprised if I had three children all with the same birthday, but I read in the paper that it happened to one family...http://nrich.maths.org/12177Wed, 01 Dec 1999 00:00:01 +0000Spots and Measles99% of people who have measles have spots. Ben has spots. Do you think he has measles?http://nrich.maths.org/12171Wed, 01 Dec 1999 00:00:01 +0000Chance CombinationsCan you design a bingo board that gives you the best chance of winning?http://nrich.maths.org/12156Wed, 01 Dec 1999 00:00:01 +0000Tools for Thinking about ProbabilityCan you design your own probability scale?<br />
How do you describe the different parts?http://nrich.maths.org/12152Wed, 01 Dec 1999 00:00:01 +0000What do you know about Probability? (2)What are the likelihoods of different events when you roll a dice?http://nrich.maths.org/12151Wed, 01 Dec 1999 00:00:01 +0000What Do You Know about Probability? (1)What is special about dice?<br />
How can we use dice to explore probability?http://nrich.maths.org/12150Wed, 01 Dec 1999 00:00:01 +0000NRICH Resources for Every OccasionThis article highlights NRICH tasks that can be used for a variety of purposes in the classroom.http://nrich.maths.org/11252Mon, 01 Sep 2014 00:00:01 +0100What Are Rich Tasks?What are rich tasks and why do they matter?http://nrich.maths.org/11249Mon, 01 Sep 2014 00:00:01 +0100Tilted Squares - Teaching Using Rich TasksWatch Charlie and Alison teaching a lesson and read about the teaching points they consider to be important.http://nrich.maths.org/11248Mon, 01 Sep 2014 00:00:01 +0100Puzzling Place ValueCan you explain what is going on in these puzzling number tricks?http://nrich.maths.org/11215Wed, 01 Apr 2015 00:00:01 +0100Teaching Secondary Mathematics Using NRICH ResourcesAn introduction to using secondary NRICH activities in the classroom.http://nrich.maths.org/11121Wed, 01 Oct 2014 00:00:01 +0100ReversalsWhere should you start, if you want to finish back where you started?http://nrich.maths.org/11118Mon, 01 Sep 2014 00:00:01 +0100Making a DifferenceHow many different differences can you make?http://nrich.maths.org/11012Wed, 01 Apr 2015 00:00:01 +0100Number ShacksCan you figure out how sequences of number shacks are generated?http://nrich.maths.org/11008Mon, 01 Sep 2014 00:00:01 +0100Dotty Grids in the ClassroomThis article suggests ways in which a dotty grid can be used in the classroom as an environment for rich explorationhttp://nrich.maths.org/10818Sat, 01 Mar 2014 00:00:01 +0000What we think and why we think itThe Secondary Team's beliefs about teaching mathematics, and the ideas that have inspired us.http://nrich.maths.org/8068Thu, 01 Jan 2015 00:00:01 +0000What Numbers Can We Make?Imagine we have four bags containing a large number of 1s, 4s, 7s and 10s. What numbers can we make?http://nrich.maths.org/7405Tue, 01 Feb 2011 00:00:01 +0000Take Three from FiveCaroline and James pick sets of five numbers. Charlie chooses three of them that add together to make a multiple of three. Can they stop him?http://nrich.maths.org/1866Tue, 01 Feb 2011 00:00:01 +0000Cinema ProblemA cinema has 100 seats. Show how it is possible to sell exactly 100 tickets and take exactly £100 if the prices are £10 for adults, 50p for pensioners and 10p for children.http://nrich.maths.org/1864Tue, 01 Feb 2011 00:00:01 +0000Largest ProductWhich set of numbers that add to 10 have the largest product?http://nrich.maths.org/1785Tue, 01 Feb 2011 00:00:01 +00001 Step 2 StepLiam's house has a staircase with 12 steps. He can go down the steps one at a time or two at time. In how many different ways can Liam go down the 12 steps?http://nrich.maths.org/1019Tue, 01 Feb 2011 00:00:01 +0000