Curricular Support for a CyberPatriot Club
I'm not sure how engaging these would be, but as a source of exercises and practice content, you might look towards IT professional certifications. There are things like A+ (general IT), Networking+, CCNA (Cisco), or MCSA (Microsoft sys admin), among many many exams that are quite popular and have a variety of study resources online.

This PCWorld article has some decent overviews of the tests. I'm dubious of an article promoting certifications based on studies by a group that sells certifications, but regardless, hopefully it has pointers to resources you might be able to pull from.