A Praxis II content assessment is often required. The only scenario in which the candidate would NOT have to take the assessment for the appropriate subject area/grade range is when the teacher has a declared major area and is wishing to extend grade range in that area from high school certification to middle school certification. For example, a teacher who is fully certified in Mathematics, Grades 8-12, would not need to take a Praxis II test to apply for extending that certificate to Mathematics, Grades 5-9.