Market - subscription based educational website

We need someone creative to perform some sort of marketing campaign to increase our subscription rates of our educational webiste. See the attachment to see which website. We are very conscious of number: ROI, and your bid must make sense. If it is like google adwords or msn, then don't bother. We can do them ourselves. If you have a talent and some sort of unique methods to reach to clients, let us know. We'll work together for very long time. Let us know your experience, and what you can do for us. Show us some of your results within the budget first.