Afterschool Alliance (information source and advocate): http://www.afterschoolalliance.org
Assessment Tools in Informal STEM (Program in Education, Afterschool & Resiliency, Harvard): http://www.pearweb.org/atis
Association of Science & Technology Centers (professional organization with annual conference): https://www.astc.org
Center for Advancement of Informal Science Education (extensive resources and portal to literature): https://www.informalscience.org
Children’s Museum Research Network (Association of Children’s Museums and University of Washington): https://childrensmuseums.org/initiatives/childrens-museums-research-network
Citizen Science Association (member organization for public participation in scientific research): https://citizenscience.org
Framework for Evaluating Impacts of Informal Science Education Projects: Report from a National Science Foundation Workshop:
https://www.informalscience.org/framework-evaluating-impacts-informal-science-education-projects
ITEST Learning Resource Center (technical assistance site for NSF Innovative Technology Experiences for Students and Teachers program): http://stelar.edc.org
Learning Science in Informal Environments: People, Places, and Pursuits (National Research Council synthesis of research on informal learning): https://www.nap.edu/catalog/12190
NASA Museum & Informal Education Alliance (free membership organization for informal education professionals): https://informal.jpl.nasa.gov/museum
National Informal STEM Education Network (develops and tests informal learning resources on current science and technology): https://www.nisenet.org
NSF Division of Research on Learning in Formal and Informal Settings (links to programs, including current Informal Science Education projects): https://www.nsf.gov/div/index.jsp?div=DRL
NSF INCLUDES National Network (comprehensive initiative to strengthen STEM equity): https://www.includesnetwork.org
Portal to the Public Network (connects scientists to publics): https://popnet.instituteforlearninginnovation.org
Racial Equity Tools (curated resources): https://www.racialequitytools.org
Relating Research to Practice in Informal Learning Environments (synopses of peer-reviewed research): http://rr2p.org
Science Festival Alliance (connects communities and science through festival format): https://www.sciencefestivals.org
SciGirls Connect (resources to encourage girls to explore STEM): http://www.scigirlsconnect.org
SMILE Pathway (digital library of STEM learning activities, tools, and resources for school-age children outside the classroom): https://www.howtosmile.org
STAR Library Network (connects libraries with STEM activities and resources): https://www.starnetlibraries.org
STEM Learning Ecosystems Community of Practice: https://stemecosystems.org
Visitor Studies Association (focus on understanding and enhancing the visitor experience in museums and other informal learning settings): https://www.visitorstudies.org