PLT offers free resources, curriculum and online classes.
Green Teacher has really fantastic books and webinars
Project Wet offers free resources curriculum, in class and online professional development.
Focus Wild is AZGFD award-winning wildlife education program. AZGFD was one of the very first organizations I took professional development classes from when we moved to AZ and I don't think I missed a class since moving to AZ.
NAIMSA offers free monthly webinars. They also have a managment training certification program. If you join the organization as a member you can also view past webinars.
Become a trained & certified volunteer giving back service hours to Natural and Cultural History Community Partners.
Our Arizona environmental education certification course aligns with NAAEE’s Guidelines for Excellence Preparation & Professional Development preparing participants to create a professional portfolio while gaining knowledge, skills, and experience toward certification.
Cornell Lab of Ornithology offers free monthly webinars throughout the school year for educators.