Describes an activity used at the Washington Park Arboretum that helps students understand cloning through plant propagation. Students also learn how to make a pot from recycled newspapers and how to make soil that is appropriate for the plants. (DDR)

Describes a laboratory project for first-year biology students that examines competition among various cellular slime molds. After a brief introduction to the topic of competition and basic life history information about cellular slime molds, students choose a question and design original experiments to seek an answer. (Author/AIM)

Describes a novel demonstration of the acid-base chemistry of the aluminum ion. (DKM)

Explains the use of ancient and modern units to measure length, time, mass, and weight which could be used for either elementary or secondary school students. Theories from Galileo and Newton are discussed, and helpful Web sites are included. (LRW)

Describes an activity, designed to comply with the National Science Education Standards, that integrates science and mathematics concepts. Mathematical modeling of the moon's phases is employed to show students the role of mathematics in describing scientific phenomena. (DKM)

Presents lessons with activities that integrate a science unit about seasons, energy from sunshine, and radiation from the sun, with a mathematics unit about angles and trigonometric functions. (ASK)

Presents a method for teaching aspects of mechanics using juggling. This approach requires an understanding of the three ball juggling pattern. Recommends teacher-guided deconstruction of the ball motion and discusses acceleration, force, gravity, impulse, and momentum. (DDR)

Presents an activity to teach natural selection that involves students in a microbiological investigation. Students discover that a change in environmental conditions tests a species' range of adaptations. (DDR)

Presents an activity that simulates involvement in a paleontology dig in which students in teams unearth a skeleton and follow field procedures for documenting the dig and handling specimens. Provides details of each stage of the project. (DDR)

Describes a comparative study project where seventh grade students tested water samples from 10 cave sites that had been tested 24 years ago in a study that had attempted to determine if pollution in the environment had reached cave water. Discusses lab skills and some results of the study. (JRH)

Describes an approach for making chemistry relevant to everyday life. Involves the study of kinetics using the decomposition of hydrogen peroxide by vegetable juices. Allows students to design and carry out experiments and then draw conclusions from their results. (JRH)

Discusses the use of multimedia programs in making field trips more worthwhile experiences. Allows students to explore at their own pace, expand on the glimpses of the exhibits that they saw during the field trip, and research additional information that they may have missed during the tour. (JRH)

Presents nine science activities to help students improve their thinking and problem solving skills. Activities cover the science process skills of classifying, ordering, space-time relationships, inferring, predicting, and elaborating. (MKR)

Gives a lesson plan for the purposeful introduction of leaf-dwelling organisms to streams of the area in order to study the organisms and indicate the relative health of the stream. Includes organism identification charts. (MKR)

Presents experiments with polarized light for grades 8-12 which can produce colorful effects with a minimum of equipment and can illustrate many principles of physics, chemistry, and geology. (MKR)