Describes a science teacher's personal experiences at an Earthwatch summer workshop in Costa Rica on caterpillars and their predators in the dry tropical forest. (YDS)

Explains the process of establishing transgenic plants which is a very important tool in plant biology and modern agriculture. Produces transgenic plants with the ability to synthesize opines. (Contains 17 references.) (YDS)

Introduces a chemistry course designed for preservice teachers that focuses on increasing the knowledge of students using hands-on, constructivist, inquiry-based science experiences. (YDS)

Explains a thin-layer chromatography (TLC) experiment that allows students to study complex mixtures of lipids using small volumes. Uses a water-soluble dye to stain lipids that is fast and safe. (YDS)

Illustartes how colleges can begin to develop links with museums in order to capitalize on the extensive resources available to them. (Author/CCM)

Children notice seeds and plants every day. But do they really understand what seeds are and how they are related to plants? Have they ever observed what is inside the seed? What happens to the "things" inside a seed when it grows? What do plants need to grow, and what do they need to stay healthy? Through a sequence of three related learning…

While the sight of a spider may cause a shriek of alarm from an adult, the very same sight might evoke a squeal of delight and fascination from a child. Even "icky" and "gross" creatures can become part of great science lessons. That's the goal of "Spiderrific," a unit of the New Jersey 4-H Science Discovery Series.…

Ask any elementary teacher to discuss the obstacles they face when trying to implement inquiry-based science teaching and you?re sure to hear hands-on materials mentioned. Where to get supplies and how to pay for them, how to organize and store the materials, and how to distribute the materials efficiently during the lessons are constant…

In contemporary science education, the trend is to engage students in hands-on activities in which they must manipulate equipment and gather data in an effort to answer questions. Hands-on experiences may turn out to be meaningless unless the experiences are well designed, planned, and focused so that students are guided to construct accurate…

This laboratory exercise affords students a hands-on experience learning about traditional dyes, fiber strength, and paper making. It is economical, simple to prepare, provides satisfactory results, and is student friendly. Dyes were extracted from plant leaves, stems, roots, and fruits. Hard-boiled eggs were place in the dyes for 15 minutes to…

Violins, earthquakes, and the "singing rod" demonstration all have something in common--stick-slip frictional motion. The application of stick-slip friction can be extended to a ringing wineglass, exotic percussion instruments, car racing, and the latest research on the interplay between surfaces at the atomic level. These examples all involve two…

Laboratory components of introductory biology college-level courses are becoming increasingly rare. Due to the absence of laboratory funding and time, instructors at all levels are faced with the problem of implementing inquiry-based projects. In this article, the authors present an activity that they developed for the 50-minute discussion period…

Old bones are often discolored by the grime that infiltrates spaces in the matrix once occupied by blood vessels. This suggested that allowing dry bone to absorb colorants might be a useful way to show the three dimensional complexity of bone vascularization. The authors have developed a simple way to show blood vessels spaces in bone at a glance…

As science gets squeezed in the elementary curriculum, at least two Florida districts are trying a new approach to keeping hands-on lessons a part of pupils' experiences. This article reports how Broward and Palm Beach county districts have increased the number of science specialists working in their elementary schools--teachers who, like physical…

A number of chemical concepts can be easily illustrated in a more friendly way to children by using toys as teaching tools in the classroom. Some of the examples illustrated are shrinking toys, drinking birds and hand boiler.