60http://nrich.maths.org/8697en 2012 http://nrich.maths.org/public/terms.phpIn this article for teachers, Jennie Pennant outlines how group-worthy tasks support the development of children's problem-solving skills.http://nrich.maths.org/9935Mon, 01 Apr 2013 00:00:01 +0100This article for teachers suggests a range of activities to help children get better at working in groups.http://nrich.maths.org/9903Mon, 01 Apr 2013 00:00:01 +0100This collection of activities offers an opportunity for you to focus on improving children's group-working skills. Read the articles to find out how group tasks help to develop children's problem-solving skills and our reasons for selecting these particular tasks.http://nrich.maths.org/9895Mon, 01 Apr 2013 00:00:01 +0100This article for teachers outlines different types of recording, depending on the purpose and audience.http://nrich.maths.org/9871Fri, 01 Feb 2013 00:00:01 +0000Lynne McClure gives an overview of the ACME report 'Raising the bar: developing able young mathematicians', published in December 2012.http://nrich.maths.org/9778Fri, 01 Feb 2013 00:00:01 +0000This article for primary teachers suggests ways in which to help children become better at working systematically.http://nrich.maths.org/9776Tue, 01 Jan 2013 00:00:01 +0000How many necklaces can you make that fit the rule? How do you know you've got them all?http://nrich.maths.org/9523Fri, 01 Feb 2013 00:00:01 +0000How could you arrange at least two dice in a stack so that the total of the visible spots is 18?http://nrich.maths.org/8586Fri, 01 Feb 2013 00:00:01 +0000Investigate the different numbers of people and rats there could have been if you know how many legs there are altogether!http://nrich.maths.org/8315Tue, 01 Feb 2011 00:00:01 +0000This big box adds something to any number that goes into it. If you know the numbers that come out, what addition might be going on in the box?http://nrich.maths.org/7819Tue, 01 Feb 2011 00:00:01 +0000This interactivity allows you to sort logic blocks by dragging their images.http://nrich.maths.org/7192Tue, 01 Feb 2011 00:00:01 +0000"Ip dip sky blue! Who's 'it'? It's you!" Where would you position yourself so that you are 'it' if there are two players? Three players ...?http://nrich.maths.org/7185Tue, 01 Feb 2011 00:00:01 +0000This task develops spatial reasoning skills. By framing and asking questions a member of the team has to find out what mathematical object they have chosen.http://nrich.maths.org/6986Tue, 01 Feb 2011 00:00:01 +0000This task depends on learners sharing reasoning, listening to opinions, reflecting and pulling ideas together.http://nrich.maths.org/6983Tue, 01 Feb 2011 00:00:01 +0000This task requires learners to explain and help others, asking and answering questions.http://nrich.maths.org/6981Tue, 01 Feb 2011 00:00:01 +0000This task requires learners to explain and help others, asking and answering questions.http://nrich.maths.org/6980Tue, 01 Feb 2011 00:00:01 +0000This task depends on groups working collaboratively, discussing and reasoning to agree a final product.http://nrich.maths.org/6978Tue, 01 Feb 2011 00:00:01 +0000A task which depends on members of the group working collaboratively to reach a single goal.http://nrich.maths.org/6973Tue, 01 Feb 2011 00:00:01 +0000A task which depends on members of the group noticing the needs of others and responding.http://nrich.maths.org/6938Tue, 01 Feb 2011 00:00:01 +0000A task which depends on members of the group noticing the needs of others and responding.http://nrich.maths.org/6937Tue, 01 Feb 2011 00:00:01 +0000Use your addition and subtraction skills, combined with some strategic thinking, to beat your partner at this game.http://nrich.maths.org/6589Tue, 01 Feb 2011 00:00:01 +0000This is a game for two players. Can you find out how to be the first to get to 12 o'clock?http://nrich.maths.org/6071Tue, 01 Feb 2011 00:00:01 +0000Ranging from kindergarten mathematics to the fringe of research this informal article paints the big picture of number in a non technical way suitable for primary teachers and older students.http://nrich.maths.org/5805Tue, 01 Feb 2011 00:00:01 +0000Can you sort these triangles into three different families and explain how you did it?http://nrich.maths.org/5638Tue, 01 Feb 2011 00:00:01 +0000Ben and his mum are planting garlic. Use the interactivity to help you find out how many cloves of garlic they might have had.http://nrich.maths.org/5579Tue, 01 Feb 2011 00:00:01 +0000This big box multiplies anything that goes inside it by the same number. If you know the numbers that come out, what multiplication might be going on in the box?http://nrich.maths.org/5576Tue, 01 Feb 2011 00:00:01 +0000Sort the houses in my street into different groups. Can you do it in any other ways?http://nrich.maths.org/5157Tue, 01 Feb 2011 00:00:01 +0000This practical problem challenges you to make quadrilaterals with a loop of string. You'll need some friends to help!http://nrich.maths.org/2913Tue, 01 Feb 2011 00:00:01 +0000Use the interactivity to help get a feel for this problem and to find out all the possible ways the balls could land.http://nrich.maths.org/2858Tue, 01 Feb 2011 00:00:01 +0000There is a clock-face where the numbers have become all mixed up. Can you find out where all the numbers have got to from these ten statements?http://nrich.maths.org/2127Tue, 01 Feb 2011 00:00:01 +0000There are three baskets, a brown one, a red one and a pink one, holding a total of 10 eggs. Can you use the information given to find out how many eggs are in each basket?http://nrich.maths.org/2002Tue, 01 Feb 2011 00:00:01 +0000In Sam and Jill's garden there are two sorts of ladybirds with 7 spots or 4 spots. What numbers of total spots can you make?http://nrich.maths.org/1816Tue, 01 Feb 2011 00:00:01 +0000How would you move the bands on the pegboard to alter these shapes?http://nrich.maths.org/1813Tue, 01 Feb 2011 00:00:01 +0000These pictures show squares split into halves. Can you find other ways?http://nrich.maths.org/1788Tue, 01 Feb 2011 00:00:01 +0000A game for two people, or play online. Given a target number, say 23, and a range of numbers to choose from, say 1-4, players take it in turns to add to the running total to hit their target.http://nrich.maths.org/1272Tue, 01 Feb 2011 00:00:01 +0000Ten cards are put into five envelopes so that there are two cards in each envelope. The sum of the numbers inside it is written on each envelope. What numbers could be inside the envelopes?http://nrich.maths.org/1177Tue, 01 Feb 2011 00:00:01 +0000Arrange the four number cards on the grid, according to the rules, to make a diagonal, vertical or horizontal line.http://nrich.maths.org/1138Tue, 01 Feb 2011 00:00:01 +0000Ram divided 15 pennies among four small bags. He could then pay any sum of money from 1p to 15p without opening any bag. How many pennies did Ram put in each bag?http://nrich.maths.org/1116Tue, 01 Feb 2011 00:00:01 +0000Use 4 four times with simple operations so that you get the answer 12. Can you make 15, 16 and 17 too?http://nrich.maths.org/1081Tue, 01 Feb 2011 00:00:01 +0000On the planet Vuv there are two sorts of creatures. The Zios have 3 legs and the Zepts have 7 legs. The great planetary explorer Nico counted 52 legs. How many Zios and how many Zepts were there?http://nrich.maths.org/1005Tue, 01 Feb 2011 00:00:01 +0000Put operations signs between the numbers 3 4 5 6 to make the highest possible number and lowest possible number.http://nrich.maths.org/943Tue, 01 Feb 2011 00:00:01 +0000Make one big triangle so the numbers that touch on the small triangles add to 10. You could use the interactivity to help you.http://nrich.maths.org/192Tue, 01 Feb 2011 00:00:01 +0000Can you work out how many flowers there will be on the Amazing Splitting Plant after it has been growing for six weeks?http://nrich.maths.org/159Tue, 01 Feb 2011 00:00:01 +0000If you put three beads onto a tens/ones abacus you could make the numbers 3, 30, 12 or 21. What numbers can be made with six beads?http://nrich.maths.org/152Tue, 01 Feb 2011 00:00:01 +0000Find all the numbers that can be made by adding the dots on two dice.http://nrich.maths.org/150Tue, 01 Feb 2011 00:00:01 +0000Use the 'double-3 down' dominoes to make a square so that each side has eight dots.http://nrich.maths.org/146Tue, 01 Feb 2011 00:00:01 +0000Noah saw 12 legs walk by into the Ark. How many creatures did he see?http://nrich.maths.org/136Tue, 01 Feb 2011 00:00:01 +0000Vincent and Tara are making triangles with the class construction set. They have a pile of strips of different lengths. How many different triangles can they make?http://nrich.maths.org/93Tue, 01 Feb 2011 00:00:01 +0000Roll two red dice and a green dice. Add the two numbers on the red dice and take away the number on the green. What are all the different possibilities that could come up?http://nrich.maths.org/53Tue, 01 Feb 2011 00:00:01 +0000Investigate the number of faces you can see when you arrange three cubes in different ways.http://nrich.maths.org/42Tue, 01 Feb 2011 00:00:01 +0000Three children are going to buy some plants for their birthdays. They will plant them within circular paths. How could they do this?http://nrich.maths.org/36Tue, 01 Feb 2011 00:00:01 +0000