There are many different types of electric pencil sharpeners available it is all a matter of what you are looking for and what you need it for. The one top electric pencil sharpener for classroom use and well- liked by teacher is the X-Acto ProX Classroom Electric Pencil Sharpener. It is a heavy-duty sharpener that is on the pricier side but well worth it It has a quiet operation and stops automatically. I can be used for different size and shape pencils. This one is top of the line but you might not need one that is heavy duty so the best idea is to check out the electric pencil sharpener reviews online and choose the one that suits you the best.