Practical work involving laboratory experiments is agreed upon to be an essential component of secondary science education. Practical work encompasses a broad range of activity types. The different forms of practical work are not equal in terms of cognitive demand and learning benefit. Inquiry-based investigations provide experience of cognitive…

Describes an activity designed to allow secondary students to practice pattern recognition using the proof-of-purchase scanning lines found on many consumer products. Provided are a list of materials, procedures, and student activity sheets. (CW)

Two presentations at the 1981 International Conference on Chemical Education are summarized: (1) current and future rationales for chemistry instruction and use of Gowin's V for more effective chemistry teaching and (2) creative adaptability toward challenges of chemistry content, society, and the individual, focusing on learning chemistry by…

Two activities in which students use the human body to collect meaningful data that will be used symbolically in the form of sets of equations to search for patterns in nature are described. The mathematics and science concepts/skills, background information, objectives, lesson outline, and extensions are included. (KR)