PNG ICO ICNS MORE
Mixed
Flat
Things
Book, knowledge, education
LightSkyBlue
512x512
PNG ICO ICNS SVG MORE
Orbicons (Free)
ruler, measure, pencil
YellowGreen
PNG SVG MORE
Sports & awards
theSquid.ink 40
diploma, award, school
LightGray
448x512
Higher Education Icon Set
mathematics, numbers, school
Gray
256x256
Desktop apps
Edge
school, Atom, science
MediumTurquoise