Advocates the use of a free-sort categorization technique for evaluation of higher-order science instructional objectives. An explanation and demonstration of the use of the evaluation technique with 284 ninth-grade science students is provided. (CP)

Investigates the consequences of inquiry and didactic teaching when students either cooperate or compete with each other on (a) students' acceptance of the teaching method, (b) their approval of the teacher, (c) their experience of peer support, and (d) their beliefs that they have learned. Eighty fourth and fifth grade students were randomly…

Reviews classroom teaching ideas including burning sugar cube experiments, science library reference materials, and growing salt crystals. (SL)

Presents a quantum mechanical model of the ionic solid, lithium hydride. (SL)

Presents a systematic approach to reviewing carbon-carbon reactions in an advanced organic chemistry course. (SL)

Reports on this recently developed program which is a single subject alternative to physics and chemistry. In the program, the interrelationships of science and technology are examined. Teaching methodologies and instructional materials are described. (CP)

Advocates changing the role of secondary school science from one of theory verification and problem solving to the formulation and acceptance of hypotheses for observed phenomena. Provides an example of the procedure using Hooke's Law. (CP)

A manipulative model for the addition, subtraction, and multiplication of integers is described in which a carpet square with a hole in it and the plug that fits in the hole are "opposites" of each other. Several other models for integer multiplication are briefly described. (MN)

Describes a technique for illustrating basic chemical engineering skills in reactor design and process analysis. (SL)

Reports on adverse side effects in an organic chemistry course taught by the Personalized System of Instruction (PSI). (SL)

Described is the development of a simulation, or model of an existing congested pedestrian crossing situation by elementary school students in order to conduct trials of their solutions. (MN)

The use of counting sticks as a concrete manipulative material in the development of number understanding and the concept of place value is strongly urged. (JT)

Questions regarding the type of teacher input and its effect on immediate and delayed performance in student problem-solving are examined. Specific guidelines for the classroom teacher are then suggested. (Author/MA)

The author proposes that computer programs which are designed to make algorithmic structures accessible and comprehensible be employed as advance organizers in mathematics instruction. These programs would bring clarity and structural integration to mathematical, instructional, and cognitive structures important to the mastery of mathematical…

Presents an experimental method for introducing special relativity which utilizes the distinction between Doppler effects for sound and for light. (SL)