Eoghan,
given the changes that are coming with respect to STEM in the Irish primary curriculum, I think it is important to assess where your school currently is on STEM.
There are changes around SESE vs Science, Technology, and Engineering Education and Social and Environmental Education which have changed the time allocation over a month. As this course has tried to show, Geography Skills and Science Skills work so well together, so that may be a way to continue to offer science within the 3h 20 min to 4 hours a month that is suggested for junior classes.