my impression about this section

well... this section is almost finished, but i have lots of word that i wanna say here. I start level 4 in YUELI, and I got a very good teacher in that level. my witting was improved. Before I studied in the level 4, I didn't know that I need to write a thesis statement and a conclude sentence at the end of every paragraph. Therefore, I thought YUELI was a very very good English leaning school. Time flies, I'm almost finished level 5a. Honestly, I feel sad, because this section is the best one i have ever had. Both teachers are very good, i think they are the best teacher in YUELI. What do you guys think? At the beginning, I was surprised that there are two teachers of core class, and the class will be so tough. Although the class is very tough, and I have lots of homework to do almost every day, my English improved a lot, especially my writing. I think everyone in this class is very lucky due to the teachers. I don't know whether you guys have same impression about our teacher with me, but I had 2 core teachers before, so compare with others, I think our teacher are excellent. I love them. Moreover, I love everyone in our class, because everybody is friendly and has very good personality. I couldn't forget every single person in my class.