where can i find educational mottoes and logos?

Answer 1

Go to Latin Phrases & Mottoes by Rose Williams
to find some of them translated from Latin:

http://ablemedia.com/ctcweb/consortium/latinmottoes1.html

Here are the 1st 4, to give you an example:
Amherst College Terras irradient
Baylor University Pro ecclesia, pro Texana
Brooklyn College Nil sine magno labore
Brown University In Deo speramus