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An Evaluation Of Hands-On Instruction As A Method To Improve Observation Skills In Second Grade Students, Lydia Rogers
An Evaluation Of Hands-On Instruction As A Method To Improve Observation Skills In Second Grade Students, Lydia Rogers
Master's Theses
A hands-on assessment tool for testing second-grade students' ability to discriminate physical attributes (size, shape, color, texture, pattern, edge, part-to-whole, and type) of mollusk shells was developed, pretested, and administered to 48 second-grade students at Maybeury Elementary School, Henrico County, Virginia. Treatment group students (n = 24) attended five afterschool, activitybased classes in which close observation of object a~tributes was taught. The classes included the same discriminations as did the assessment test but used different materials. Control and test group students were retested. Neither paired t test nor question-by-question analysis showed a significant improvement in the test group's score. Presence …
Relationships Of Epidermal Morphology And Breeding Behaviors In Pebble Nest-Building Minnows (Pisces: Cyprinidae), William R. Mcguire
Relationships Of Epidermal Morphology And Breeding Behaviors In Pebble Nest-Building Minnows (Pisces: Cyprinidae), William R. Mcguire
Master's Theses
Abstrad The objective of this study was to determine if epidermal morphology corresponds with reproductive behavior in cyprinid fishes. Representative species of nest-building fishes (Nocomds leptocephalus, Semotilus atromeculatus, exoglossum maxillingua) and non nest-building fishes (Campostoma anomaulm and Clinostomus funduloides) were studied. Light and scanning electron microscopy were used to examine epidermal morphology and keratin distribution of skins from the snout, cheek, mandible, anterior dorso-lateral trunk, and caudal peduncle of breeding males of nest-building species and were compared to those in non nest-building cyprinid species. Previous frame-by-frame analysis of video tapes of reproductive activities of each species and literature accounts were …