How can I search for someone on facebook who went to my school but not in my graduating cl?

Facebook used to have it where I could search for lets say the entire 2006 graduating cl that went to my high school... now I can't even search the year! also it asks for the persons name what if i don't want to search for one persons name or i forgot the name it used to list people automatically without having to put the stupid name in. Why the heck did facebook change so much they made the site worse.