Center for Innovations in Education (CISE). CISE is a collaborative program of the Missouri
Department of Elementary and Secondary Education and the University of Missouri-Columbia
College of Education
Show-Me middle school math center. This is a very important site provided by the state of
Missouri to improve middle school math curriculum. A must visit for teachers and administrators.
Center for Innovations in Education (CISE)
StarLab activities from Southeast Missouri State University.
The site has lesson plans based on Missouri Curriculum Frameworks by grade level. 
A must visit website by Stowe Middle School teachers.
Missouri Council of Teachers of Mathematics
Math resource center. This is a center that provides materials & manipulatives for use
in your classroom, with no charge to you. This center is on the campus of
South East Missouri State University. It serves teachers of mathematics
grades  K to 12.  It has manipulatives, software, and resource materials that
can be checked out and used in the classroom.
Missouri's Frameworks for Curriculum Development
Missouri Botanical Gardens