Molecular symmetry and orbitals are two important chemical concepts which can be difficult for students to visualize in three dimensions; as such, instructors have traditionally adopted a variety of approaches to teach them including the use of physical models and digital renderings/resources. This paper describes a new mobile device application…

A mathematical model of information acquisition is presented and empirically evaluated in comparison to evidence obtained from experimental studies of science content acquisition. Implications of the model for human information acquisition and future research are discussed in the context of the unique theoretical framework of the model. (Author/JN)

An experiment applied the theories of knowledge engineering and expert systems to science instruction for junior high school students. The model encourages a more creative, constructivist approach to teaching certain science concepts and skills while fostering improvement of logical thinking, communication, and independent learning skills. Results…