Specially designed materials were used for teaching trigonometric ratios to 131 ninth- and tenth-grade students, one group using calculators and one not. Results on achievement were mixed. (MP)

Comparison of the computation ability in addition, subtraction, multiplication, and division of 155 students (ages 9-14) with learning disabilities (LD) and 266 normally achieving (NA) students demonstrated that NA students outperformed students with LD. Students with LD had more algorithmic errors, and failed to show growth patterns by age. NA…

Discussion of connectionist views for adaptive clustering in information retrieval focuses on a connectionist clustering technique and activation spreading-based information retrieval model using the interaction information retrieval method. Presents theoretical as well as simulation results as regards computational complexity and includes…

Suggests use of the quadratic formula to build understanding that connections between factors and solutions to equations work both ways. Making use of natural connections among concepts allows students to work more efficiently. Presents four sample problems showing the roots of equations. Messy quadratic equations with rational roots can be solved…

Enumeration and numerical reasoning levels of 19 children with specific language impairment (SLI) were compared to children matched for age and children matched for grammatical ability (GM). Children with SLI performed better than the GM group on reproduction of sets, numerosity of sets, an addition/subtraction condition, and transformation…

Discusses a meaningful experience, conceptually, of multiplication of fractions. (Author/YDS)

Describes a framework to help teachers decide when to use calculators with their students. (YDS)

Discusses a content-integration program in which Spanish is introduced while mathematics and other subjects are reinforced, creating a winning combination for students, teachers, and preservice teachers alike. (Author/NB)

Explores young children's intuitive strategies for partitioning sets of objects. (Author/NB)

Discusses how teachers can help English-language learners develop computational fluency. (Author/NB)

Focuses on children making sense of multiplication. In an activity called "Silent Multiplication," students use what they know about easier multiplication problems to solve increasingly difficult, related problems mentally. (Author/NB)

Develops computational fluency using a game format. Activities involve a standard deck of playing cards. (Author/NB)

Discusses the positive results of incorporating two essential elements of learning--language patterns and visualization--found in Japanese classrooms into a first grade classroom in Minnesota. (Contains 12 references.) (Author/YDS)

Presents a number of transcript examples of correct and incorrect transferences by children. Considers the objects of transference including spoken words, written symbols, models and diagrams, arithmetic procedures, and structures. Discusses the use of transference in arithmetic education. (YP)

An Angoff method and a frequency estimation equipercentile equating method were compared, using data from three forms of a 200-item multiple-choice certification test. Data requirements are fewer and computational requirements less burdensome for the former than for the latter method. However, results of the two methods are not interchangeable.…