The National Science Digital Library (NSDL) presents Science and Math Informal Learning Educators (SMILE) at HowtoSMILE.org. You will find over 1077 science and math activities designed specifically for non-classroom settings. This site is a collaboration between several partners and the high quality is immediately evident. This site is a great source of engaging FREE STEM activities for after school programs, Family Math & Science Nights, etc. Add this site to your math and science resource bookmarks now!