A standard mock test replicates the traditional testing situation (usually SAT or ACT). An extended time mock test allows for extra time, in order to replicate testing conditions for a student who qualifies for extended time on the actual test, due to diagnosed learning disabilities. If your student will be taking the traditional test - then go with the standard mock test. For more information about extended time and other SAT/ACT accommodations, check out Extended Time and other Accommodations in our Jed Said series.