End User License Agreement: You are free to use any resource created from this site as an end user and MES grants you an End User License with the following restrictions: You may not redistribute, copy, modify, transfer, transmit, repackage, re-engineer, charge for, or sell any of the materials from this site. You may use photocopies or printouts for the purposes of distributing them for free to your students. MES reserves the right to terminate or make changes to this agreement for any reason and without notice.