1. Automatic course design and evaluation: Artificial intelligence can be used to design automatic content, such as lesson plans, tests and assignments. These tasks are not only time-consuming and laborious, but also can use artificial intelligence algorithm to optimize automatic test and evaluation, and adjust teaching methods according to the results, so as to make teaching more suitable for students' learning needs.

2. Voice assistants and chat robots: Artificial intelligence is also used to develop teaching tools such as voice assistants and chat robots, which can solve some basic problems in the classroom (such as answering students' questions), and this part of the work can be handled automatically. Moreover, the chat robot can reply in real time, saving teachers a lot of time and energy.

3. Online education: Online education can use the data mining and big data analysis functions provided by artificial intelligence to gain a deeper understanding of students and learning behaviors and trends. This can help teachers understand students' learning needs, knowledge level and learning methods, and make fine adjustments in teaching, thus providing better teaching results.

These are the reasons why artificial intelligence may hit teachers first. However, artificial intelligence technology is only one of the teaching technical means and cannot completely replace the role and responsibility of teachers. Modern education needs diversified teaching methods and tools to meet different learning needs. Artificial intelligence is just one of them, and teachers will still play an important educational role, such as guiding students and providing support and guidance.