Front end first or Back end first. Of the two which is a Good system design pratice?

Question

I have a client right now requiring me to develop a school enrollment system. Now this is the first time im having this kind of challenge. Most of the past software that i created are not that complex.

I know most all of you have created complex softwares, i just want your advise on this. Should i design first the front end or back end?

thanks!

Here's a conclusion of an article I found in the internet a while ago. Just whant to share

http://www.skitoy.com/p/front-end-vs-back-end-developers-my-take/157

Front-end vs. back-end developers (my take)

My personal take

Again it’s a matter of training, some broad stroke generalizations:

Front end developers

• Typically don’t have a CS degree, or have a CS degree from a 3rd tier school.
• Work in languages that similar to basic (see PHP is Basic)
• Have a visual skill in converting photoshop documents to CSS/HTML/etc.
• Have a high tolerance for iterative programming, due to type free languages

Back end developers

• Have a CS degree or lots of experience
• Tend to me more systematic in their problem solving approach
• Don’t mind spending days finding the one object that is leaking
• Try and build tools to solve problems