experimental research on a specific grammar feature

Please help me... I have to do a experimental research on a grammar feature .. I was thinking in doing a research on which is the best way to teach irregular verbs.... or somethink like that.. My teacher said that we can use a study all ready done and follow the steps and get to the results bye doing it. but i haven't found a good one yet..please can you help me to get a good and easy research..thanks

[Tdol]

Shouldn't the research be into something you're interested in rather than looking for something easy that has already been done?