Hopscotch, basketball, or hide-and-seek? Children have many choices at recess, and while making these choices they must consider and make trade-offs. The way they make these decisions is not that different from the thought processes engineers use when making design trade-offs. Engineers have to make trade-offs because a design that meets all…

This article describes a two-semester general chemistry laboratory teaching approach to assist students in gaining experience with science-process skills. The ultimate goal is successful completion of a second-semester service-learning project requiring use of their newly developed science-process skills. The project entails creating an…

A weak negative attitude towards learning science was noticed among the students in Qatar, a matter that was reflected on their achievement in national tests. To test if the use of PBL would improve the students' attitudes towards learning science, a sample of 25 nine graders from Hamza school were motivated to plan their own investigations and to…