An effective way of letting your colleagues know about what the students have taken part in during the year would be to send a short report to them. This could be joint authored by you and selected students and can be visual as well as informative. It’s important to show positive impact as well as the breadth of activities that have been organised. Some suggests include:
Instead of, or as well as, you could organise a series of assemblies, where the students able to present to staff and their peers, what they experienced and how it has helped to change their perception of higher education.