EXPRESSIONS & SUBSTITUTION EXTRA PRACTICE

EXPRESSIONS & SUBSTITUTION EXTRA PRACTICE

Postman Phil
http://www.bbc.co.uk/education/mathsfile/shockwave/games/postie.html

Substitution Help
http://www.interactivestuff.org/sums4fun/substitute.html

Function Machine
http://teams.lacoe.edu/documentation/classrooms/amy/algebra/5-6/activities/functionmachine/functionmachine5_6.html