Does "尚" mean studying or learning?
尚 means: esteem; value; uphold 

尚 can be short for 崇尚  (to advocate; uphold) 

"尚学" can be interpreted as "崇尚学問" (advocating knowledge)

"尚德" can be interpreted as "崇尚美德" (advocating virtue)

"尚武" can be interpreted as "崇尚武學" (advocating martial arts)