Standardized tests are used to measure the academic progress of students both individually and by groups. Testing results help teachers determine areas for improvement in instruction and can help parents know how their child is progressing relative to other students the same age.

As required by Indiana State Statute, Plainfield Schools participate in the Indiana Standardized Test of Educational Progress, ISTEP, in mathematics, language arts, social studies, and science. ISTEP assesses student achievements in grades 3-8 and 10.