Teachers and students can down load the shareware 3D geometry workbooks. It is shareware in the sense that if the person downloading is 100% satisfied with the workbook, and has come away with a better feel for 3D geometry, then they are asked to remit a fee to the following address: Robert Conroy, 312 East 79th Street, K.C. MO 64114. The suggested fee for each level of workbook, for classroom use, is $8 for Level 1, $10 for Level 2, and $12 for Level 3. The teacher has authorization to print and make as many copies of original, hopefully to 70# paper or card stock, for the use of students in that class. In the case of independent students, the suggested shareware fee would be $1 for Level 1, $2 for Level 2, and $3 for level 3.
To access the shareware workbooks from an ftp site, click on the following appropriate description. You will probably find it easier to print from the gif files located within the zip files at the following ftp sites.