Portfolio Reflection about Science Fair

We need to do a science project for Science Fair. My project is about the relationship between temperature and yeast. My testable question is what will change to the yeast in different temperature? I did all work by myself, the PART A, Part B, and the Part C. Part a including  title, testable question, brief explanation, the independent variable, the dependent variable, and the controlled variable ...when I saw other students' work, I think my work is still not good, but I can't find the reason.