'You and your skin': a short-duration presentation of skin cancer prevention for teenagers.

The effectiveness of a short-duration presentation of the educational material 'You and Your Skin' was tested on 184 adolescents (age 13-15) at the Year 7 and 8 levels. A non-equivalent control group design was used with pre-testing and post-testing 3 months after the intervention. The intervention increased the students' knowledge of known risks factors for skin cancers.