I took Algebra 1 in 9th grade, and Algebra 2 and Geometry in the 10th grade. The 9th graders in my Algebra 2 class (who took Algebra 1 in 8th grade) had holes in their algebra background because middle school algebra is taught at a lower level than high school algebra. But I wasn't behind, for I took AP Calculus in 11th grade successfully because of a strong foundation from high school level algebra classes. However, I'm struggling with placement choices for own children as we speak.