The National Math Trail

An opportunity for K-12 teachers and students to discover and share the math that exists in their own environments. Students explore their communities and create one or more math problems that relate to what they find. Teachers submit the problems to the National Math Trail site, along with photos, drawings, sound recordings, videos--whatever can be adapted to the Internet. All submissions will be posted to the site as they are submitted. They are also be indexed according to grade level and math topic and will remain on the site for access by educators, students and parents.

http://www.nationalmathtrail.org/