To analyze your own improvement is a little bit odd, because you can not see easily your own improvement. It is similar to measure kids growing up, we never realize the gradual progress; however, our improvement can be measure by grades, and by how comfortable we feel when we are speaking in English. For me, I believe that my improvement in writing and grammar is growing so slow that I could not noticed. The more I learn, the more I feel that I need to learn more.