Of course there is, but none of that is run by HR, we have a lady who is the finance officer and does the payroll and recruitment.
Heads of department are responsible to the head, as are all the teachers and to the respective head of department, there is an annual appraisal meeting with your HoD which lasts 30 mins or so. And once a year on average a lesson observation from the head / deputy head, but they leave you alone after a while, its been 4 years since I've been observed.
Largely though, you fend for yourself, I wouldn't expect to have much in the way of management day to day, we have meetings to standardise marking and assessment, discuss scenes of work etc.
In 20 years I've never had the kind of HR related convo I hear about from friends who work in the corporate environment.
If I'm ill I report my absence to reception before 8.00 that day, and unless signed off every day until I return. If I'm signed off it gets reported to the Bursars office and will be good for the length of the Drs note, unless incapacitated from doing so I'd still be require to set cover lessons for that period.