Perform required tasks such as sweeping, mopping floors, finishing floors, emptying and cleaning waste receptacles, trash and pencil sharpeners, refilling towel and soap dispensers and toilet tissue, removing cobwebs, cleaning windows, cleaning all chalkboards, cleaning and sanitizing restrooms, dusting and polishing furniture and woodwork as necessary. Regulate heat, ventilation and air conditioning systems (if applicable) to provide temperatures appropriate to the season and ensure economical usage of fuel, water and electricity.