4U Curve Sketching is probably the easiest topic. It just seemed to follow on from 3U really smoothly.yeh, volumez were pretty difficult for me to take in as well. i spent nights upon nights trying to do the problemz from an excel book, which assumed knowledge of the entire 4 unit course, until i finally broke through and understood them. the only thing that would put me down wif volumez would be graphs which i havent covered. are graphs hard btw?
Also stop putting z at the end of words instead of s...