Conditions of employment include job descriptions, hours of work, holidays and leave entitlements, benefits, opportunities for professional development, advancement, and codes of practice. These should be embedded in offers of employment or employment contracts.
The two aspects of employment contracts, fundamental to staff morale, are consistency and transparency.
It is not wise to offer different pay and conditions to different people with the same job description. That leads to discontent, passive resistance and non-compliance.
For transparency, ensure everyone has a contract copy, with salary scale and benefits. This will help negate any lack of trust.
Published job descriptions give clarity about who is responsible for what. This ensures all aspects of running a school are covered and minimises power or responsibility conflicts. It also defines the limits of each position.
The following links lead to an example of an employment contract and a collection of job descriptions.