The links for the research are given below. The key to the Signature Project is to develop a proposal around a topic that you have a particular interest or passion relating directly or indirectly to student achievement. The topic can focus on your particular classroom, school, or district. Possible topics might range from the effects of differentiated instruction on student achievement to the impact of bullying on student attendance (which, by the way, indirectly affects student achievement). Provided below are a couple of websites where you can review sample titles for major research projects (i.e., dissertation topics).
USC Digital Library
Signature Project Stage 1 Chapter 1