Presents an activity in which students: identify agricultural crops that are grown in Great Lakes states, understand how global climate change will affect these crops, hypothesize about crops that could replace these, compare the current crops' economic value with projected replacement crops, and analyze the impact of global climate on the…

Presents an activity in which students use a discovery approach to learn about seed texture, similarities and differences among seeds, and which seeds grow on which trees. (MKR)

Describes a process to develop high school laboratory activities using intertidal ecology of the New England Coast as an example. (MKR)

Describes a unit on rain forests in which first graders studied about rain forests, built a classroom rain forest, and created a bulletin board. They also graphed rainfall, estimated body water, and estimated the number of newspapers that could be produced from one canopy tree. (MKR)

Students are often as mystified by mathematical procedures as they are by magic tricks. This article suggests ways of making the estimation of how many jelly beans in a jar and the 20-questions game less magical and more understandable. (MKR)

Uses pattern blocks to model basic parts-of-a-whole fraction concepts. Suggests that students reflect these models in oral, written, pictorial, and symbolic representations. (MKR)

Provides measurement, estimation, and data analysis activities for grades three to four and five to six using boxes of cereal and containers of frozen yogurt. (MKR)

Describes data exploration and graphing based on data in the story "Ten for Dinner" by Jo Ellen Bogart. (MKR)

Diagrams that illustrate characteristics that are always, sometimes, or never present in a concept can be categorized as examples or nonexamples to broaden students' understanding of basic geometric concepts. (MKR)

Four elementary schools, 10 third-grade teachers, and their students (n=168) participated in a quasiexperimental study to determine the impact of individual versus collaborative planning and traditional versus problem-focused curriculum on students' learning of multiplication. Results favored collaborative planning and problem solving. (MKR)

The more that students see themselves in everyday situations that involve mathematics, the more likely they are to be successful. Incorporating names, ages, and other personal data into mathematical activities is easy and fun. (MKR)

Middle-school students were asked to determine the dimensions of a hotel atrium so that guests could enjoy the maximum area of scenic view, given that 650 feet of brass railing could be used around each floor. Several solution approaches are described. (MKR)

Describes an inquiry activity in which students explore the variables that influence the amount of time it takes a ball to roll down an inclined plane. Relates features of the activity to recommendations in the NCTM Standards. (MKR)

Hierarchical concept maps can be used to preview or review a topic, serve as a means of formal or informal assessment, promote classroom discourse, and provide a visual representation of mathematical connections. (MKR)