Several teachers from State College (Pennsylvania) Area School District became intrigued with helping their students better understand the science associated with a unit on air and aviation. In particular, they observed that students often encountered difficulty with abstract flight concepts, such as lift, thrust, and drag. Content issues became…

In this article, the author gives basic information on constructing a wind tunnel that teachers can use for instructional activities with their students for many years to come. He illustrates and describes the procedure and materials that he developed in constructing his own wind tunnel. This information should be viewed as a guide. (Contains 1…

The rate training manual is designed as a self-study text for Navy and Naval Reserve personnel preparing for advancement to Petty Officer Third Class (TD 3) to Second Class (TD 2) in the rating of Tradevman. Chapter 1 provides information on the enlisted rating structure, the TD rating, requirements and procedures for advancement, study references…