What if everyone in the world did a good deed for three people - and what if each of them 'paid it forward' by doing a good deed for three more people, and so on, until the world was a different place? PAY IT FORWARD begins when social studies teacher Reuben St Clair gives his class an extra assignment: implement a plan that will change the world. Trevor, a boy with an active imagination and a loving, though dysfunctional, mother, rises to the challenge. His plan is this: he'll do something good