I did a search for "Business Manager for a Primary School" in Google and got lots of hits.
One was for a job vacancy and it said the following was part of the job
•Payroll preparation and data input
•Maintenance of personnel data on SIMS (staff/student database) and input of data to Oracle (HR system) relating to changes, appointments and terminations
•Handling all elements of the school's invoice processing and payments, purchase orders, reconciliation of the purchase ledger control account, credit card statement and petty cash procedures and administration
•Financial administration, sales ledger activity, bank reconciliations, and recording and processing of income, for example relating to school trips and visits, external lettings etc
•Production of other management information as required for the senior leadership team, taking the minutes during governor's meetings