Sweaters are what students need most. If you want to look different here, you should choose some colors that few people wear, such as cyan, red, pink, orange and so on. It will be more beautiful and spiritual to jump out of the classic black, white and gray.
Knitted top with A-line skirt is a more professional dress. It is possible that you will look younger and more elegant than the teacher. After all, few students wear it, so wearing a watch is more stable and tasteful.