If the first dose of a tetanus toxoid-containing vaccine is administered before the first birthday, 4 doses are necessary before beginning the 10-year cycle of booster doses. If the first dose is administered after the first birthday, 3 doses are necessary.
Teacher-Authored Instructional Unit Samples. The content specialists in the Standards and Instructional Support office have been working with educators across the state to create instructional units based on the published curriculum overview samples.
Secondary Level Credit Units. The most widely used credit systems in U.S. secondary education are based on the Carnegie Unit system. Carnegie Units were proposed in 1906 as a basis for measuring school work. A unit would represent a single subject taught for one classroom period for five days a week. Fractional units would be awarded for subjects taught less frequently.