A demonstration of how to order a set of fractions by converting them to fractions with a common denominator and positioning them on a number line. The twentieths are reduced to their simplest form by cancelling out common factors in the numerator and denominator.
Using visual representations to help pupils understand how to convert fractions into fractions with a common denominator may help. For example, using pizza or pie slices (3/4 of a pizza is the same as eating 15/20 of a pizza because you are slicing each 1/4 into 5 pieces.) The class could play 'The price is right' whereby children guess whether the next fraction to be pulled out of a bag is going to be higher or lower than the previous one. If they are correct, they have another go! Children may be challenged to convert fractions into fractions with a common denominator to prove they are correct.