Introductory carpentry classes provide students with an overview of the methods and technologies used in residential and light commercial carpentry and are typically taken at the beginning of a carpentry program. Hands-on experience and lectures make up the class content, which can cover building codes, site layout, estimating, interior and exterior finishes, framing and cabinetry. Additional subjects of instruction may include footing and foundation forming, concrete specifications, OSHA/WISHA construction safety standards and basic carpentry math.