The Test of Achievement and Proficiency (TAP) is a norm-referenced achievement test for students in high school, published as part of the Riverside 2000 Integrated Assessment Program by the Riverside Publishing Company. Forms K and L of the TAP were published in 1994. The Test of Achievement and Proficiency is made up of 4 levels. Description of Standardized Tests Used by Various Jurisdictions 195 Levels 15–18 are intended for administration to students in 9th through 12th grade. These levels are published in two lengths, the Survey Battery and the Complete Battery. The Survey Battery contains a section each for reading, language, and mathematics, with an optional section for math computation.

The Complete Battery contains a section each for vocabulary, reading comprehension, written expression, math concepts and problem solving, social studies, science, and information processing, with an optional section for math computation. The TAP (both batteries) are published in two equivalent forms, Form K and Form L. Forms K and L of the Test of Achievement and Proficiency were normed (in a joint norming program with the ITBS) in the spring and fall of 1992. The norming was conducted using a stratified random sample of public school districts, Catholic private schools, and other private schools. The spring sample included approximately 170,000 students, while the fall sample included approximately 100,000 students.