This paper charts the recent history of the STEM Learning UK contracts with local Science Learning Partnerships (SLPs) and identifies what leadership has been made available to support the Early Years and Primary school sector. A case study approach is taken using 'Super SLP' hubs in England. Curriculum Hubs exist in core subject areas such as maths, English, science and computing. They have recently been expanded to include Behaviour Hubs. This forms the current DfE strategy of Teaching School Hubs (TSHs), i.e., to offer system support and a full career-length support for all stages of teacher-career and leadership development. This paper charts the changes to the Early Years (EY) and Primary teacher support networks, in science particularly, and examines what they provide and how this can be improved, and discusses, through session evaluation and feedback, what teachers have appreciated the most.