The purpose of this study was to develop a paper-pencil test of Piagetian levels of proportional thinking for junior high school students in the context of physical science. Two thousand twenty-seven students were tested to develop the instrument and the description of its characteristics. The final form consisted of 24 items with four subtests…

Subjects selected from all the ninth grade intact science classes of a suburban junior high school were assigned to either a control group or one of four intensive instruction groups. The procedures for each instructional group included both watching a discrepant event until six acceptable hypotheses were written and individual discussion during…

Five questions are developed as an analytical scheme by which the basis for knowledge claims in science textbooks can be analyzed. The scheme is based on three conditions of knowledge: (1) if the claim is true (the truth condition), (2) if there is adequate evidence for the claim (the evidence condition), and (3) if the claim is believed to be…

This booklet, one of a series developed by the Frederick County Board of Education, Frederick, Maryland, provides an instruction module for an individualized or flexible approach to 7th, 8th, and 9th grade science teaching. Subjects and activities in this series of booklets are designed to supplement a basic curriculum or to form a total…

This booklet, one of a series developed by the Frederick County Board of Education, Frederick, Maryland, provides an instruction module for an individualized or flexible approach to 7th, 8th, and 9th grade science teaching. Subjects and activities in this series of booklets are designed to supplement a basic curriculum or to form a total…

This booklet, one of a series developed by the Frederick County Board of Education, Frederick, Maryland, provides an instruction module for an individualized or flexible approach to 7th, 8th, and 9th grade science teaching. Subjects and activities in this series of booklets are designed to supplement a basic curriculum or to form a total…

This booklet, one of a series developed by the Frederick County Board of Education, Frederick, Maryland, provides an instruction module for an individualized or flexible approach to 7th, 8th, and 9th grade science teaching. Subjects and activities in this series of booklets are designed to supplement a basic curriculum or to form a total…

This booklet, one of a series developed by the Frederick County Board of Education, Frederick, Maryland, provides an instruction module for an individualized or flexible approach to 7th, 8th, and 9th grade science teaching. Subjects and activities in this series of booklets are designed to supplement a basic curriculum or to form a total…

Provides suggestions for planning a school in-service meeting to acquaint teachers with aerospace education resources and ways to introduce aerospace themes into a variety of disciplines. (MLH)

Describes two secondary-level classroom games designed to teach the balancing of chemical equations and the principles of chemical bonding. (MLH)

Analyzes several factors in an impact study of Biological Sciences Curriculum Study (BSCS) and states that its major impact has been to make curriculum change respectable. (LS)

Indicates how the gas laws can be derived and taught to high school and college physical science classes by using the guided-discovery method. (LS)

An eight-day trip segment of a science curriculum was spent in the outdoors for students who live in a potentially dangerous environment to learn to respect it and how to use it as an area for recreation and education. The design and high points of the curriculum are given. (EB)

Presents a list of Biology-A level projects submitted for the Oxford and Cambridge Board examination by pupils of Uppingham School in the United Kingdom. (HM)

A field trip to a science activity center in Southwest England for secondary school students is described. (BB)