The assumptions common to all capture-recapture models for estimating population size are reviewed. A simulation using either a playing board, counters, and dice or computers is described. Classroom implications of using the board game are discussed. (KR)

Discussion of science and math instruction for elementary and secondary students highlights the use of microcomputer-based laboratories (MBL). Data collection, storage, and display are discussed, the use of databases to organize and manage information is described, and the exchange of ideas with other students through telecommunications is…

Describes a project where students were involved in finding the most suitable site for a landfill in their community. This two-month project was conducted using team teaching. Two twelfth grade geoscience classes were involved. (PR)

Uses computers to help students identify variables controlling pendulum period. A program written in BASIC for the Apple computer is provided. The activities are useful for developing science skills, mathematics skills, and computer skills. (PR)

Discusses the following questions: (1) What is hands-on science? (2) What does it mean to be engaged in hands-on science activities (HOSA)? (3) How can teachers tell good HOSA? (4) When is a good time to use HOSA? (5) What can students learn from HOSA? (6) What assessment techniques will help teachers understand what students are learning? (PR)

Presents two techniques involving simple and inexpensive demonstrations: (1) explains how pressure inside cells gives them mechanical strength, and (2) shows how water can be pulled up stems. Both can be adapted to suit a variety of levels of instruction. (PR)

Describes the use of role playing and skits for instruction in protein synthesis. (PR)

Provides background information on DNA fingerprinting, and describes exercises for introducing general biology students at the high school or college level to the methodology and applications of DNA fingerprinting. (PR)

Describes how lectures, laboratories, and role playing can be used to introduce students to the importance of water quality of water used for plant growth. (PR)

Describes an activity in which students examine hypothetical exposure to toxins by being showered by different colored pieces of confetti over several visits to exposure sites. Students record quantities of confetti that stick to packing tape. Colors correspond to different toxins posing different health problems. Students process their findings…

Presents the following guidelines to consider before, during, and after hands-on inquiry: (1) plan and prepare; (2) create problem intrigue; (3) give students the responsibility of solving the problem; (4) offer feedback and guidance; (5) debrief; and (6) anticipate, prevent, monitor, and adapt. (PR)

Presents an activity in which students construct model hot air balloons to introduce the concepts of convection current, the principles of Charles' gas law, and three-dimensional geometric shapes. Provides construction and launching instructions. (MDH)

Describes the teacher's guide made up of 125 student activities encompassing 1 year of high school physics instruction called Physics Resources and Instructional Strategies for Motivating Students (PRISMS). The learning cycle of each activity includes three phases: exploration, concept introduction, and concept application. Provides exploration…

Describes teaching strategies, including science activities, for challenging students' misconceptions about turtles and helping limited-English-proficiency students enhance their language proficiency. (PR)

Describes having students write lab reports that concentrate more on writing and independent thought. Students take the role of scientists writing about their findings for publication. The teacher acts as a journal editor, reading the reports and either accepting them for publication or suggesting ways for improvement. (PR)