Show me inexpensive learning interventions that work

Show me inexpensive learning interventions that work:
Alongside the eLearning Network's Campaign for Effective Elearning, I propose that we also need to be highlighting any learning interventions that really work.

And by "work", I don't mean ones that necessarily use state-of-the-art technologies and high quality graphics. They might look good to the people paying the bills, but are they really what is needed to solve the problem?

I mean the interventions that are being produced on a daily basis by learning professionals (and those who aren't professionals - where they are allowed!)

To be included in the list, they need to:

1. Reach maximum audience for minimum cost
2. Be tested on a realistic sample of real learners
3. Have made a demonstrable positive difference to the behaviours or skills of those learners

For a start, I'd like to propose my own video how-to on changing a light bulb in a Ford CMax, and the analysis I did on its effectiveness.

Thanks to Barry Sampson for stimulating this train of thought.

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