The second unit the seventh grade students studied and will continue to study is Stretching and Shrinking . The focus of this unit is geometry and it teaches students to understand and to use the concepts of similarity.
Students look at what it means for figures or shapes to be mathematically similar.
The goals of the unit include having students explore relationships among figures that have been stretched or shrunk, and the resulting changes in the properties of the figure, such as perimeter, and area. The students will use properties of similar figures to explore reductions and enlargements made on copy machines. By the end of this unit the students will be able to create similar figures, how to determine whether two figures are similar, and how to predict the growth of the lengths and areas between two similar figures. Presently we are working on a unit on the Constitution and the frameworks for our American Government. The unit includes the Bill Of Rights and the other amendments to the Constitution.