Deeanna Golden, a teacher of 24 years at F.M. Golson Elementary
School in Marianna, Florida, is a beloved Illuminations lesson plan
writer. So we asked her, "Why do you think it is important to share resources?"
In this unit, students will use
geoboards to visualize the geometric meanings of square and square root.
Each geometric investigation in this
unit begins with an open-ended question that engages students in a study of
triangles and their properties. This lesson was adapted from "IDEAS"
by Marea W. Channel, which appeared in the November, 1993 Arithmetic Teacher
(Teaching Children Mathematics), Vol. 41, No. 3.
In this interactive geometry investigation,
students explore polyhedra using different representations and
perspectives for three dimensional block figures. In addition, students
will examine area and volume concepts for block figures within this
If possible, each student should have access to an individual computer.
In this unit, students collect data
using objects, pictures, and symbols. They organize data by sorting and
classifying in different ways. Students display data using multiple