Primary school example
Normanhurst School is an independent school in Waltham Forest. It has an online form for staff to request absence.
Secondary school examples
Holbrook Academy in Suffolk has a form in appendix 1 (page 18) of its leave of absence policy.
Rishworth School, an independent school in West Yorkshire, has an online form (scroll down to absence request / staff cover form) to manage staff absence requests and staff cover.
Special school example
Riverside School, an all-through community special school in Kent, has an online form to manage staff special leave applications.
Local authority example
Waltham Forest Council has a template staff leave of absence form for schools. It covers different reasons that staff may be absent.