Worksheets on 3 x 3 magic squares are provided: one emphasizes recognition of results when a square is flipped or rotated; the other two give practice in computation with whole numbers, fractions, decimals, and integers. (DT)

The organization and rationale for elective mini-unit courses as a supplement to the traditional junior high mathematics program is described; a list of possible topics is included. (DT)

After practice in making cross-section cuts on four solids, 90 sixth-, eighth-, and tenth-graders were tested on ability to select appropriate drawings for designated cross sections. Sixth graders had significantly lower mean scores than upper graders; boys scored significantly higher than girls; lower-ability students generally scored lower. (MS)

Sample workcards on number operations, patterns of numbers, and algebraic notation are presented to illustrate how a theme in mathematics can be developed. (DT)

Self-instructional booklets varying advance organizers, post organizers, and knowledge of behavioral objectives according to experimental treatment were used with 348 eighth graders and 259 preservice elementary education students. A significant interaction between the advance and the post organizers was found on one learning test. Students scored…

Described is a physical realization of the Klein four-group which shows the isomorphism of the symmetry group of the rectangle and Piaget's INRC group of logical implications. (MM)

Included are worksheets providing activities in representing sets of months by rosters, phrases, and Venn diagrams, in using directed arrows with calendar numbers, and in conducting a survey and graphing data. (DT)

The article is based upon the author's experiences in England and America. (JM)