Not easy to answer without more detail. Monetisation depends on the type of people you have visiting. StackOverflow had a lot of difficulty monetising with adverts for books from Amazon, which they concluded was because people come there looking for free stuff, rather than to buy things (http://blog.stackoverflow.com/2009/11/our-amazon-advertising...). Other sites find this works well.
Who are your main users and why would they come to the site? Teachers? If so, what level - school, college, postgrad? Managers who purchase stuff for the teachers, maybe?
I would imagine you will also have to take into account the skills being demonstrated on the site and the value they have to employers. If your site will attract the best and brightest (e.g. top coders on StackOverflow) whom employers want to recruit, then I think the job listings would be more valuable than if it's mostly made up of people looking for free stuff to save themselves the hassle of making it themselves.
Who are your main users and why would they come to the site? Teachers? If so, what level - school, college, postgrad? Managers who purchase stuff for the teachers, maybe?
I would imagine you will also have to take into account the skills being demonstrated on the site and the value they have to employers. If your site will attract the best and brightest (e.g. top coders on StackOverflow) whom employers want to recruit, then I think the job listings would be more valuable than if it's mostly made up of people looking for free stuff to save themselves the hassle of making it themselves.