- AL Environmental Services
- Celtic Harmony Education
- Circle of Life Rediscovery CIC
- Commonwork
- Compassion in World Farming
- The Co-operative
- Creative Sustainability CIC
- Department Education Centre South Yorks (DECSY)
- Devon County Council
- Earth Watch (Teach Earth)
- Field Studies Council
- Forest School Association
- Friends of the Earth Youth & Education
- Forest of Dean, Transition Education Group
- Geographical Association
- Groundwork Thames Valley
- Groundwork North East
- HEC Global Learning Centre
- Hopscotch Consulting
- Icebergsoft – School Carshare
- Institute for Outdoor Learning
- Koru Education
- Lancashire Global Education Centre (LGEC)
- Learning Through Landscapes (Ltd)
- Magilligan Field Centre
- Modeshift
- MF Associates
- NAFSO
- National Union of Students (NUS)
- NEAD (Norfolk Education & Action for Development)
- Ngaire Takano Consultants
- Norfolk County Council
- Pannage
- People and Planet
- Peterborough Environmental City Trust
- Plan Internation UK
- Resike
- Royal Horticultural Society (RHS)
- RSPB
- Send A Cow
- Sussed Bus
- Teaching For A Better World
- The Geography Collective – Mission:Explore
- The Royal Parks Foundation
- The Tutor Pages
- TYF Adventure
- Wastebuster
- Wastewatch
- Wiltshire Council
- Worcester County Council