I am not permitted to adjust the values of each test, we give 6 tests all of equal weight. I do, however, adjust the value of the various parts of the test. Our students need to learn machine operations, machine coding, math, machine shop theory and vocabulary. It is easy to have one section of the test become predominate in the score so I assign each section of the test a percentage of the total score depending how foundational and important that section is. I am more concerned with the importance of the information or skill for success in their career rather than the difficulty of the subject. Most of the time the simpler sections wind up with more weight because they are the foundation of future success. It is easy to do this by creating an Excel spreadsheet to enter each section grade in to get a total test grade.