@Proton2: that's my experience back in Taiwan. All equations with very little explanations. Then I come to US relearn everything again, and it is so much easier to understand because they took time to explain it. They even explain the previous class material just in case we forgot. Well, maybe because I took it the second time in US, it is a lot easier for me to understand as well. Something I always liked about US math for lagging 4 years. I have something to compete off the plane.