For planning purposes, allow 12 weeks to process requests and obtain the permission.
Additional information is available from the link below, or contact the USAHEC Acquisitions Section at 717-245-3194 or usarmy.carlisle.awc.mbx.ahec-acq@mail.mil
The Copyright Clearance Center (CCC) is a respected non-profit organization dealing with copyright issues. The below links lead to educational resources CCC provides. Of particular interest to instructors is the "Copyright on Campus" video link, which gives a brief overview of what is and is not legally considered fair use.
The last link leads to CCC's general educational resources page. It contains all of the above information, including general copyright white papers and tips not specifically linked to below.