We've been using this model in our 6th grade classroom for the past science unit. We've been learning about the Earth's weather system and it's effect on human life. Over winter break, students collected data on the weather including: temperature, wind, and precipitation. When we returned to school, students were given a situation. The board of directors for the "local" airport was seeking their help to solve some of the problems that employees have brought forward. One of the major problems was that the work uniforms for the employees that worked outside on the runways, were not appropriate for the climate of the region.
This situational problem and project based learning gave students a goal to work towards and allowed them to focus their learning and see how an application of their knowledge would actually be presented.