National STEM Centre, York, UK, (Science, Technology, Engineering, Maths) https://www.stem.org.uk/
Peter Goodhew, who helped set up world-leading education in engineering in Liverpool, who has a (free !) e-book on engineering education. http://www.goodhew.co.uk/
IRIS, Institute for Research in Schools. Set up by the amazing enthusiastic Becky Parker, IRIS gets students involved in research, often using datasets from large experiments, and can get you started with the VERTIGO computer/sensor device. http://www.researchinschools.org/
Michael de Podesta, researcher at the National Physical Lab in Teddington, near London, has long done great outreach things from there, including his famous protons for breakfast course for the non-scientist man or woman. His blog continues in this tradition. https://protonsforbreakfast.wordpress.com/