Dan,
There's a story about the defense of Steinau here:
http://www.feldgrau.net/forum/viewto...st=0&sk=t&sd=a
At first sight it doesn't mention the Glogau (nowadays Glogow) military school, but it may give an impression about the conditions.
Glogau itself was surrounded by the Russians on 9 Feb 1945, but only capitulated on 1 April 1945.
Regards,
Leendert