I TA'd 1XX3/1AA3 once in the same semester (January 2010 I believe).

During the first tutorial I was given special instructions for the students coming from 1LS3, and those were: to cover the topics that were covered in 1A03, but not in 1LS3. To "Bridge the gap" so to speak.

The biggest one was Integration by Partial Fractions. (You can see my tutorial notes here: (

http://www.math.mcmaster.ca/~parchim...tutorial_1.pdf)) Some students may also not know what the arctangent function is (tan^{-1}), or more importantly, its derivative (1/(1+x^2)). This knowledge is important for partial fractions (as is outlined in the note).

That being said, it's definitely possible to go from 1LS3 to 1AA3. You need a 10 or higher in 1LS3 however (though in my opinion that's a bit excessive), but I have seen those exact students go on to excel in 1AA3...likely because they had already scored 10+ in 1LS3.