I am really loving Issuu as of late. I have written about it before here. As a teacher, one of the first places I go to look for resources is YouTube and TeacherTube. I like to embed these videos into my class websites. Now the next place I will try is Issuu. There are a lot of great resources there that may be untouched, like this one on Notes on Graphic Design and Visual Communication (thumb below). Teachers and students, SHARE your resources! Everyone is always nervous about putting themselves out there in the open but some of the best feedback I have received has been from strangers. When uploading, you also have the option of making it a downloadable PDF. Give it a try. I am currently pushing it in my school. I am considering using it to store my art units for students and then embed them into our class website.