PNG ICO ICNS MORE
UI
Glyph
Windows 8 metro style
school
DarkSlateGray
512x512
Pixel
Gnome icons
Black board, teaching, learn
Black
48x48
3D
Nuvola
school, Books, Bookcase
Salmon
128x128
Edutainment, learn, package
DarkGreen
Crystal Clear
tutorials, Black board, table
DarkSeaGreen