You may obtain ArcGIS 10.x through COSINe.

Just fill out the form at:

http://is.oregonstate.edu/accounts-support/software/user-workstation-software/arcgis

For help contact Angela at software.coordinator@oregonstate.edu or 541-737-3848.

Note: Currently OSU uses ArcGIS 10.2 in a majority of courses this academic year (fall term 2015-spring term 2016).