The lesson plans in this document relate to a museum exhibit but have suggestions that can work for many classrooms. The lessons focus on da Vinci's anatomical drawings.
This teaching guide about da Vinvi and his accomplishments as both inventor and artist is related to a museum exhibit but the activities can be used by any teacher to connect da Vinci to science and art.
This project from The Museum of Science examines Leonardo Da Vinci as an inventor, scientist and artist. There are several different sections, many of which have lesson plans and activities.