We use the latest norms available to homeschool families. Forms A and C are parallel forms of the same test and both use the same 2005 norms. We have limited supplies in grades PK - grade 2 in forms A [&] C (ITBS and ITED). Please order Form C or E instead. Form C has some updated questions and pictures. Form E is the latest available edition with 2017 Norms. This test is designed to evaluate critical thinking skills, measure academic growth, and to provide a comprehensive assessment of student progress in the basic skills. Your report will provide you with an in-depth assessment of your student's achievement of important educational objectives. Grades 3-8 may be tested together and grades 9-12 may be tested together. Grades PK-2 must each be tested separately. The test administrator must have a Bachelor's Degree.