<p>I'm a junior this year and wondering how similar are the two courses? Will YR1 of ESS to make a score of atleast a 4 on the AP exam? Will it require self studying with an APES book?My ESS class is VERY EASY( it should be a one year class) and I'm not taking it next year due to its challenge level. Therefore, I am definately taking the APES exam</p>