Where do I get the Toolbox?

The 09-10 Student version our school gave us, as well as the downloaded SDK version, do not appear to include the Toolbox. Installing it following the onscreen instructions goes through the motions, but nothing is installed or is available. The onscreen instructions are not very user-friendly. Using the disk to repair installaion or change installed options doesn't make any difference. Same results on two different computers. I need the Toolbox to continue my studies, but am at a loss how to install it.