InterActions in Physical Science is a yearlong physical science course for seventh or eighth grade middle school students. InterActions uses a combination of guided inquiry and direct instruction. In the guided inquiry activities students perform experiments, and they are guided in constructing many physical science concepts based on evidence from the experiments. Additional physical science concepts are taught by direct instruction. The InterActions program is complemented by powerful and innovative computer software. Supported during its development by the National Science Foundation, one link is to the publisher's website and another is to the project site.