The document provides guidance on developing and using a table of specifications (TOS) to help teachers construct valid classroom tests. A TOS helps ensure tests are aligned to instruction by mapping objectives, time spent on each objective, and cognitive level taught to the number and type of test items. It provides evidence that tests accurately measure the intended content and require similar levels of thinking to what was taught. The document explains how to create a sample TOS and use it to determine the proportion of test items devoted to each objective based on class time. An effective TOS can improve the validity of inferences made from classroom tests.