Classroom tests provide teachers with essential information used to make decisions about instruction and student grades. A table of specification (TOS) can be used to help teachers frame the decision making process of test construction and improve the validity of teacher's evaluations based on tests constructed for classroom use. In this article we explain the purpose of a TOS and how to use it to help construct classroom tests. Accessed 155,500 times on https://pareonline.net from February 21, 2013 to December 31, 2019. For downloads from January 1, 2020 forward, please click on the PlumX Metrics link to the right.