In the context of school and government staff, CCL stands for Child Care Leave — a leave entitlement that lets eligible government employees, including many teachers, take time to care for or attend to their children. It is granted under service rules, usually to women employees (and in defined cases to single fathers), subject to conditions on duration and the child's age. Rules vary between the central government and individual states.
In Indian schools
Leave entitlements are a staff-administration matter governed by service rules rather than something a school's teaching software decides. A school management system's role around staff is to hold the record and control access, not to administer government leave rules.