Course Icon on Transparent Background

This page contains the Course vector icon, as well as variations of this icon in different visual styles, and related icons. All icons are in the flat vector style, however, differ by the line thickness, fill, and corner radius.
The icon has three connected vertical rectangles. The rectangle at the center is slightly than the other two. The first rectangle has a horizontal line towards the top and two towards the bottom, the center one has at towards the top and one at the bottom, and the last has one up top and two at the bottom.

Idea of Course Icon by Anonymous

We've received the idea on July 30, 2012 and created the icons on July 04, 2013

school icon

And maybe one for grades and/or courses