ously ▁used . ▁The ▁excitement ▁of ▁print making ▁for ▁Al ps ▁was ▁in ▁the ▁cre ative ▁process . ▁He ▁preferred ▁small ▁ed itions ▁to ▁large ▁ones , ▁and ▁was ▁pro l ific ▁in ▁his ▁production . ▁At ▁this ▁time ▁he ▁worked ▁in ▁l ith ography , ▁screen print ing ▁and ▁et ch ing . ▁A ▁favorite ▁abstract ▁mot if ▁was ▁the ▁circle ▁in ▁a ▁square ▁which , ▁according ▁to ▁arts ▁rev iewer ▁John ▁Voor he es , ▁became ▁a ▁type ▁of ▁" tra dem ark " ▁for ▁the ▁artist ▁that ▁he ▁often ▁used ▁in ▁his ▁work . ▁ ▁Te aching ▁ ▁Glen ▁Al ps ▁began ▁teaching ▁in ▁the ▁Art ▁Department ▁of ▁the ▁University ▁of ▁Washington ▁while ▁he ▁was ▁still ▁a ▁gradu ate ▁student ▁there . ▁In ▁ 1 9 4 7 ▁the ▁chairman ▁of ▁the ▁department , ▁Walter ▁F . ▁Jacob s , ▁invited ▁Al ps ▁to ▁teach ▁classes ▁in ▁water color ▁and ▁design ▁as ▁an ▁acting ▁associate ▁of ▁the ▁school . ▁He ▁soon ▁began ▁teaching ▁print making , ▁as ▁well . ▁After ▁gradu ation ▁Al ps ' s ▁teaching ▁career ▁at ▁the ▁University ▁of ▁Washington ▁continued . ▁He ▁received ▁ten ure ▁in ▁ 1 9 5 4 ▁and ▁became ▁a ▁full ▁professor ▁in ▁ 1 9 6 2 . ▁He ▁was ▁named ▁Professor ▁Emer it us ▁upon ▁his ▁ret irement ▁from ▁teaching ▁in ▁ 1 9 8 4 . ▁ ▁Among ▁his ▁colle agues ▁in ▁the ▁Art ▁Department ▁were ▁the ▁pain ters ▁Wend ell ▁Bra ze au ▁( 1 9 1 0