Presented is the 1921-1945 portion of a three part presentation outlining the effect of major committee reports upon secondary school chemistry teaching objectives during the period 1893-1975. (SL)

Three examples are presented in which the chi-square statistic is computed and interpreted on survey data. (DT)

Presented is information to supplement elementary physics texts so that teachers may expand the presentation of classical optics to include some basic concepts related to photographic systems. (SL)

Worksheets are provided which lead students through an exploration of symmetry groups of geometric figures. (DT)

Games have become an integral part of many science classrooms. This article describes an electronic game box built by a seventh grade class for use with an adopted version of a television game show. Included are a list of materials, a schematic diagram, and photographs of the completed game box. (MA)

This research examined the strategy of writing a mathematics problem on the chalk board and asking "who in the class can solve it?" as a means of assessing the mathematics achievement or attitude of a sixth-grade mathematics class. The strategy was found to be unreliable. More evidence is needed. (Author/MA)

This article provides a manipulative demonstration of the relationship between the squares on the sides of a right triangle. Materials are listed and directions are given for the student. Illustrations are included. (Author/MA)

This article gives two methods of resolving natural numbers into prime factors. Depending upon the number that is being resolved, one method may be better to use than the other. However, it is difficult to tell beforehand which is the better method to employ. Examples are given. (Author/MA)

Eighth grade science students were given inventories in a triad and a paired comparison format. From these, a ranking of science categories was made. Students tended to rank earth-space and biological sciences ahead of the physical sciences. Reasons for this included inventory bias, maturational development, and a teacher effect. (MA)

The purpose of this study was to determine what degree of interrelationships existed at the beginning and end of the school year among rank orders of various factors. Results found no significant correlations among sixth grade students' attitudes towards taking mathematics and the variables: general ability, achievement, or teacher's perceptions.…

In 1975, selected high ability secondary students attended a program in Nuclear and Environmental Science. Likert-like pre- and posttests concerning aspects of nuclear technology were given to the students. Results indicated no favorable or unfavorable changes in student attitudes towards the ideas sampled. Sample questions included. (MA)

This article examines the Pythagorean Theorem from a geometric point of view by suggesting some natural extensions of the theorem. The use of a more general theorem to prove a difficult one is suggested, where possible. The article includes figures and proofs. (Author/MA)

The vast majority of people are most familiar with arithmetic in base ten. This article presents a follow-up on a problem with several divisibility tests valid in base ten which are related to Freitag's general test and which follow directly from it. Base 13 is also explored. (Author/MA)

Many students are entering college today with no more than one course in mathematics. This article relates how one university has developed a program to identify the underprepared mathematics student and to counsel students with regard to their mathematics needs. A goal is to match mathematics course with student ability. (MA)

Competition for savings dollars has led to free gift bonus offers as incentive for new deposits. A concise new formula presented here permits calculation of the total yield using an inexpensive minicomputer. Yield is expressed in terms of interest rate, effective discount value of gift bonus, and period of deposit. (Author/MA)