Main Menu with TwentyTen

I have created several pages and they add automatically to the horizontal menu at the top. Do I need for it to named “main menu” in order to have a drop down menu from one of the menu items in the top menu? For example, I want “Scholarship and Awards” to be an item/page on the drop down menu of education. I do not want it on the same level as the “education” menu item. I don’t know if that makes since, but this is the link to the web site I am creating: http://tmua.org.previewdns.com/.
This is my first web site to create in WordPress and I apologize for being so ignorant on this subject. I was lead to believe that this would be very easy, but I have to say that without know WordPress at all, this is not easy. I know HTML and Dreamweaver CS5 but they are two different breeds from WordPress.
Thank you in advance.