yeah 2 is whole step, 1 is half, and 3 is 1 and half, the only reason i wrote it this way is because it helped me learn my scales a lot easier, then when i showed this formula to a lot of beginning keyboardist, i saw how quickly the developed their scale formula, i just figured to try a new approach to learning scales. As for me, i never had musical lessons or an instructor, so i bought a lot of books from barnes and nobles, although most of the books teaches the same aspect, i found that some books were more confusing and other books were a lot easier to comprehend, such as a teacher in school, both teachers teaches the same subject (math) but for some students, they understand one teacher better then the other.