You periodically check-in with how they are doing by asking them, and sometimes you receive the productivity results via test scores on your desk. Remember, open and honest communication with your staff is key. Because you have spent time getting to know your staff and building relationships with them, they honestly tell you when you ask them. Are they where they should be in the curriculum for the year? Do they have a defined standardized test scores that their students must achieve, and if so, are they achieving it? Be sure to mention that their productivity is based on the defined metric or curriculum timeline for the school year. This gives you something to evaluate their work against.