To quickly find missing skills from common core standards in grades kindergarten to eight, we employ many strategies. For example, we present "key" problems from each common core domain area that represent the most difficult skills in that domain. If a student fails these key problems, we present problems for each of the standards in the domain. The placement test will automatically end when a student has missed more than 60% of the standards they have been given. For example, if a student misses 10% of the objectives in Kindergarten, 20% of the objectives in 1st grade, and 31% of the objectives in 2nd grade, they will finish the second grade objectives and the placement test will automatically end.