Discusses the role of techniques of DNA analysis in assessing the genetic relationships between various species. Focuses on wolf-dog evolution using DNA evidence and historical data about human/wolf-dog relationships. (DDR)

Presents an activity in which students investigate the chemistry behind color-changing markers. Includes the objectives, materials, procedures, and follow-up for the activities. (DDR)

Presents an activity that demonstrates how a traditional activity can generate questions not typically raised in a conventional course. In the context of astrobiology, students can connect to an intriguing endeavor, the search for extraterrestrial life. (DDR)

Investigates the benefits and limitations of using pre-constructed, web-based, dynamic geometry sketches in activities related to deductive proof at the secondary school level. Focuses on the relationship between the design of materials and the exploration process. Draws attention to the idea that pre-constructed dynamic geometric sketches and…

Two experiments investigated whether six individuals (ages 7-64) with developmental disabilities or autism would demonstrate stimulus classes after observing another individual demonstrate the prerequisite conditional discriminations. Results found that stimulus class technology, coupled with observation, may be an economical and efficient means…

Reports the findings of a study that examined discourse patterns and the ways in which such patterns affected student learning in a 6th grade mathematics classroom. (KHR)

A study that compared 191 college students with learning disabilities (LD) and 190 controls found students with LD reported having more difficulties in humanities, social sciences, and foreign language, devised unusual academic strategies and preferred additional oral or visual explanations, and felt more stress and nervousness during…

A study examined how 20 adults with postlingual deafness with cochlear implants combined visual information from lip reading with auditory cues in an open-set word recognition task. Word recognition performance was highest for audiovisual presentation followed by auditory-only and then visual-only stimulus presentation, and for single-talker…

Compares whole language and process-oriented science and discusses the similarities between them. (KHR)

Reanalyzes data obtained in 1987 on mental calculation strategies used by 11-year-olds in England, Wales, and Northern Ireland. Classifies mental strategies developed in the past decade in international research. Compares frequency and effectiveness of the strategies used by pupils of different levels of attainment. Discusses basic arithmetic…

Examines acquisition, maintenance, and transfer of a questioning strategy in second- and third-grade students using a multiple-baseline design. Indicates that knowledge of text structure increased and that students could reliably differentiate text structure. Describes the establishment of a 4-week procedure for integrating the questioning…

Compared classification theories of language learning strategies. Results from confirmatory factor analysis of data measured by the English-as-a-Second/Foreign-Language (ESL/EFL) version of the Strategy Inventory for Language Learning and collected from 517 college EFL learners are discussed. Suggests other possible approaches to strategy…

Examines instructional design theories and elaborates principles about when learning is promoted, i.e., when learners are engaged in solving real-world problems, when existing knowledge is activated as a foundation for new knowledge, and when new knowledge is demonstrated to the learner, applied by the learner, and integrated into the learner's…

Discusses ways to promote mathematical thinking by using effective questioning. Presents an instructional example to encourage students to think in mathematics class. (KHR)

Investigates young people's expression of mathematical ideas with a computer, the nature of mathematical practices, and the problem of mathematical meaning from cognitive and socio-cultural perspectives. Describes a mathematical activity system designed for learning and the role of digital technologies in helping to understand and reshape the…