the clever design of these sets of 6 'cards' is due to Adrian Pinel at Chichester
this set of resources practices substitution but also with a particular multiplication table
the 'cards' are best cut out
but students could just link the six expressions in a line
the number at the left is the input value
the arrow should connect with an output value
which will be the input value for a next card
and so on...
then they could work with their neighbour, e.g. with the two sets 'a' and 'b' etc.
the next set of loop card resources is intended to practice substitution with simple fractions of an amount