Ask for images
You can ask here for images for Wikipedia and sister projects and wikiArS wikimedians can try to transform your request into assignments for art students.
Please give context (Wikipedia articles, sources and references, ...) and ask for something that could be done (no derivative works from protected artworks, ...). Indicate also if the image production should be supervised by and expert and in what scope (historian, biologist, geologist, ...). Include also what you think about the prefered file format or kind of graphic (vector, bitmap, hand-made, digital, static-image, animation, illustration, diagram, ...).