From Art is Messy Blog:
I like to give my kids access to most of my art materials. In order to do this, I organize the supplies into three cubby areas: collage and sculpture, drawing and paper and finally printmaking and paint. I find that it helps to organize the room this way because always know where to look for the materials that they need.
In addition to the different material sections, I keep other supplies like pencils, sharpies, erasers, crayons, markers and colored pencils in different areas throughout my room. I like to have my materials in different areas because I feel it helps those kids who have difficulty sitting still. It gives their movement justification.
I also create bulletin boards for each grade level I teach. I put examples of the artwork that we have studied so the kids can look at it during different points of the project. I also try to include art vocabulary on these boards as well.