Where can I put these images?

One of the ideas I had about where to locate my images occured to me when I criticised online study guides such as Sparknotes for not including enough visual aids.

Obviously the images I have produced so far are very rough, but as an experiment I added colour to this one and edited it into a screenshot of Sparknotes using Photoshop. It already looks a lot better than the usual bland, inaccessible page of text.

Here's how it looked before