Attention, students are young, have poor conscious attention, and persist for a short time. A class lasts for 40 minutes, so it's hard to stick to it. Often, you start to lose your mind in the middle of listening, or look around and talk while listening. It is a common problem for many junior students not to listen, but students have a strong desire for self-expression, and often they are careless in answering questions, reading and writing before hearing a complete sentence. Look at the numbers upside down or look at the wrong lines, look at the wrong symbols, or look at the pictures incompletely, and don't concentrate enough when writing. In the aspect of thinking, the development of second-year students' thinking is not comprehensive and systematic, mainly intuitive thinking. When they encounter problems that require logical thinking or examine spatial imagination, their thinking can't keep up and their brains can't turn around. In terms of language, due to their lack of life experience and accumulated vocabulary, the language is monotonous and straightforward, even if they understand logic.