Presents a brief introduction to the argument that teachers need to challenge their basic assumptions about teaching if their classroom practice is to develop. Suggests moving away from the transmission of content from expert to novice (objectivist approach) towards a more dynamic system of shared learning (constructivist approach). (MM)

An appreciation of the relationship between novice and expert knowledge frameworks may help develop an understanding of the process of transition from one to the other. Recommends the use of concept mapping. (DDR)

Finds that the construction of concept maps may help students make links between scientific concepts and related topic areas. Describes different methods of concept map analysis which illustrate different levels of conceptual development. (CCM)

Presents materials to stimulate active learning through modified concept mapping activities designed to help students appreciate alternative perspectives by using cartoons as a stimulus and focusing on the links within a concept map fragment, and encouraging the probing of understanding by annotating the linking words. (Author/YDS)

Presents a brief overview of allelopathy, or "chemical warfare" among plants. Includes suggestions for school science topics of study and activities. (Contains 11 references.) (Author/WRM)

Suggests mural ecology as an alternative to studying other habitats, providing examples of zonation patterns, food webs, effects of physical factors, and influence of man on mural communities. Also suggests incorporating these topics into ecology courses, offering ideas for field work and comparing mural to traditional ecological studies.…