educational psychology research paper - help!

[mmilk]

hi all,
I'm a first year university student and I'm trying to find a good research paper topic for my educational psychology class.
I'm very interested in ESL and definitely planning on looking at something within this 'field,' but I don't know what topics there are that have enough research based sources. I was originally planning on working on something about the lexical approach to language teaching, but I've been snooping around the internet as well as my university library's database and I'm not convinced that there's been very much research done on this subject. Does anybody know of any approaches/methods etc. within ESL or SLA teaching that have had a significant amount of research done on them? I need to come up with a specific topic and have at least 10 reserach based sources.
Any help would be greatly appreciated.

[Tdol]

Have you used Google Scholar? There is plenty published on just about everything in ESL.