Cellular respiration and metabolism are topics that are reportedly poorly understood by students and judged to be difficult by many teachers. Although these topics may not be required learning areas in some high school biology curricula, a grasp of fundamental concepts of cellular metabolic processes is advantageous for students undertaking (or…

Presents an activity in which students propose that apples change their color as they ripen. Students gain content knowledge about decomposition, the growth of living mold, and the life cycle of fruit flies through purposeful inquiry connected to previous knowledge. (ASK)

Describes a schema-theoretic view of how analogies enhance students' prior knowledge; reviews some of the recent studies using analogies to assist students' comprehension of science text; and illustrates the use of an analogical study guide in biology. (HOD)

Describes activities from workshops with teachers on science-education standards that focus on content standards related to earth and space sciences. Activities include observing changing shadows and shadows at morning, noon, and at night. (DDR)