Here's a set of 12 mannequin clip art images. These are good all-purpose images which can be used in a variety of projects. These are large 300 dpi images with transparent backgrounds.
Commercial Use OK
You may use these images within educational resources you are making to sell here and on similar sites. I simply ask that credit is provided somewhere within your documentation.
You may use these clip art images within IWB and other digital presentations with no additional requirements.