Sieve of Eratosthenes Named after the Greek Mathematician. This classic method of finding prime numbers is also great for teaching about factors and multiples. The visnos sieve allows for multi colored squares this allows identification of any numbers prime factors.
GOT IT! – NRICH http://www.mathszone.co.uk/images/thumbimg-69l.jpg Add numbers to reach exactly the target number – before the other player or computer
Button Beach Challenge – Ambleweb http://www.mathszone.co.uk/images/thumbimg-72f.jpg Work out what numbers the buttons represent and fill in the totals of the grid
Function machine – Ambleweb http://www.mathszone.co.uk/images/thumbimg-71Y.jpg A variety of options for single and two step function machines
Guess the Number – Ambleweb http://www.mathszone.co.uk/images/thumbimg-70g.jpg Guess the number, computer says too high or low and refines guess possibility by reducing the range to guess from.
Mend the number square – BBC http://www.mathszone.co.uk/images/thumbimg-65B.jpg Put the missing numbers back in the number square. Yr R/1/2
Bead Numbers – Birmingham http://www.mathszone.co.uk/images/thumbimg-66M.jpg Making numbers on an abacus from clues eg smallest even number with 6 beads
Mystic Rose – Count On http://www.mathszone.co.uk/images/thumbimg-649.jpg Interactive mystic Rose drawer.
Crazy Counting Machine – Crick http://www.mathszone.co.uk/images/thumbimg-74a.jpg Can you reach the target number in as few clicks as possible? Makes use of doubling and halving strategies in working towards a target number.
Number maze – David Hellam http://www.mathszone.co.uk/images/thumbimg-76l.jpg Move around a maze collecting numbers, plus and multiplication signs to make a target of 100 in as short a time as possible.
Guess the number – A Blundred http://www.mathszone.co.uk/images/thumbimg-731.jpg Undo the operation to deduce starting number. Uses addition and subtraction facts, tables facts, doubles and halving, and one or two step problems to solve. Good mental starter. Levels for early years, KS1 Read More …
Magic Squares – A Blundred http://www.mathszone.co.uk/images/thumbimg-754.jpg Fill in the magic square to make the given total – 15, random or set your own total. Computer does the calculating.