<p>Does anyone happen to have any recommendations when it comes to deciding between 21 and 23? I took multivariable calculus and linear algebra this year, and I’m not sure if I’m comfortable enough to go straight into 23 in the fall - but I’m worried that 21 would be very redundant. (At the moment I’m leaning toward taking 21 to fill in gaps in my knowledge, but I might try doing that over the summer instead…)</p>
<p>Thoughts?</p>