It is designed for the download on the school/school district computers and to be available to all teachers and students. The 69 lessons on a CD are suitable for use by teachers and students in a secondary level course in Plane Geometry, including full Euclidean proofs and constructions. Prior installation of version 4 or 5 of Geometer's Sketchpad(R), distributed by Key Curriculum Press on school computers is required. Publication of this CD was supported by Key Curriculum Press with a grant to the authors. The pamphlet does not contain the CD itself. Your CD will be produced when you purchase this pamphlet. In order for us to get the CD, Explorations and Discoveries in Mathematics Volume 3 to you, please email your receipt of purchase from Lulu.com, Amazon or any other retailer to [email protected] and [email protected]. The receipt of purchase will contain your complete address. Your CD will be mailed to you upon receiving of your receipt of purchase