scheduling

I dont know if its just me but scheduling always sucks. Every time i make out a nice schedule for the next semester of all the classes i want and then they fill up so fast. Monday i looked at Math as a liberal art and half the seats were already filled. I need a math to get into the college of ed next semester and now im going to have to take a higher level math because i need one. Im also going to have classes through out the day instead of all at once. I might have class at 8 then not again until 10. I hope some of the classes i want will still be available because i dont want to end up taking only 12 credits.