The Arizona STEM Network is in its third year of promoting and funding STEM Clubs with supplies, teacher stipends, and professional development.  After starting with pilots in 11 schools, it aims to have 200 clubs in Arizona schools by the end of this year.  This collaboration of business, educators, elected officials, and philanthropic organizations has prepared on online STEM Club Guide for teachers, administrators, and funders to develop clubs, both in and outside Arizona.