The use of toluidine blue as a stain for plant tissues is advocated. Directions for hand-cut tissue staining are provided. (PEB)

Describes an eight-module, high school chemistry curriculum (including outline of course content) which encourages students to envision chemistry as a science based on general, related concepts rather than on a discipline composed of segmented, isolated topics. Module 1 objectives, assignments, laboratory experiences, and test are available from…

Discusses physics of bicycles, presenting a model of the forces acting on the bicycle and its rider. Topics considered include maximum speed coasting down a hill, maximum speed on the level, and maximum speed up a hill. This material is suitable for homework problems, independent study, or regular class work. (JN)

Provides examples of astronomical subjects and phenomena in poetry. Includes a list (author/title) of modern poems incorporating astronomical imagery. (JN)

Activities are provided for calculating speeds of celestial bodies. These focus on how fast earth rotates on its axis, how fast planets travel around the sun, and how fast the solar system is traveling with the Milky Way. (JN)

Points out textbook errors or discrepancies which are confusing or unclear in describing the photon. Cites specific texts and the particular point of confusion in each one. (JM)

Activities on the nutritional value of school lunches are provided, focusing on government nutritional guidelines and how the school cafeteria tries to meet them. Students learned nutrition and rationale/complexities behind putting together appetizing and nutritious school lunches. Includes lists of agencies providing nutrition information to…

Because students were not retaining several key chemistry concepts, a series of problems, called nightmares (for first-year students) and Igors (for second-year chemistry students), was devised so that the concepts would be used repeatedly. Two examples each of nightmares and Igors are provided. (JN)

Representations of problem-solving routes were made to understanding how British sixth-form and Canadian first year college students solve problems in chemistry. Processes used (operations performed during problems) and entities (such as information taken from problem statement) were analyzed in terms of graphic representations: links (processes)…