How to end a sentence (if at all) with a preposition?

Solution 1:

It is not always wrong to end a clause with a preposition, but, in some cases, it is considered incorrect. Here are cases of correct placement at the end.

• John was left with no one to talk to.

• (ref.: CGEL) I bought a car for Mary to drive to work in.

• (ref.) And if Job did feel this, what did he imagine God was punishing him for?

However, in your sentence the preposition can't be placed at the end; this is felt to be an awkward construction. They are several ways to make that right; here are two.

• My first quarter of school included classes such as Biology, Chemistry, and Algebra, in all of which I received an A.

• My first quarter of school included classes such as Biology, Chemistry, and Algebra; in all of those, I received an A.