Examples of educational research proposals are "New Directions in Law & Education Reform Research" and "A Comparison of Methods for Analyzing Missing Data in Longitudinal Study." These are successful research proposals as can be found on the AERA website.
In the case of "New Directions in Law & Education Reform Research," aspects like introduction, purpose, methods, perspective and finally, conclusion and implication are included in the proposal. This is an example of proposal that is considered successful by AERA or American Educational Research Association.
AERA welcomes proposals from undergraduates from all over the U.S. Successful proposals are used for roundtable sessions or as papers and posters.