This engaging PowerPoint is a great introduction to solving problems with money - it looks in detail at converting pounds to pence and vice versa as well as moving onto solving word problems with money. There is an effective activity where counters are represented as coins, therefore providing an early link with algebra.
It encourages children to work in pairs or independently to calculate with money. Scaffolding can be provided with [real] money. Most suitable for lower elementary / KS2.