The 'A' contains a man/person that is being filled with knowledge from a course. The course represented by the red colour, same red as in 'Kurs' at 'KursAgenten and the 'A'.
A version where the 'a' has a pupil, looking for relevant courses. The red hue can of course be shifted. P.S. The red square image is also constructed so that it works perfectly as an 'IPhone' icon (correct size relation) and has a glass reflection.
I like both #39 and #41, but feel that they both need som more work.
In #39 I would like the A to look like it belongs to "..genten" more than "kurs..". Maybe make it a combination of red and black... Same case in #41, and here i would also like the font to match the "iPhone icon" better.