Yes and no --
The Math/Science Third allows you, in effect, to fit two science and/or math courses into one 5-credit slot. Therefore it allows you to take four courses at the same time. However, rather than receiving 5 credits per course, the SLC norm, for the two that are sharing one slot, you receive 5 credits for the two courses combined, or 2.5 credits per course.
As a result, we advise that you do NOT do this with the hard-core prerequisite science courses - General Biology, General Chemistry, Organic Chemistry, or Physics.
However, you may use this mechanism to combine any other math/science sequences, including biochemistry, genetics, cell biology, virology, statistics, or calculus.
For more information on the Math/Science Third, click here.