Vacation 3-How I study during the vacation

Before the summer vacation started, I had some tests. Without English, I had to study Japanese and took some tests to get my credit. There are many kinds of tests, so it is hard for me to study. For example, memorization. I wrote many kinds of word  again and again  till I could remember them words. My hand was ached. However, if I did this, I could not remember. In particular, no reference subjects was hard. I remember about all of things. If I did not remember, I could not write and answer. I am not good at social studies. For example, sociology , international, and law. I think that this subject's word is difficult, because so long. Then, I write some words again and again. (126words)