High school is a critical period for everyone to study. It is the parents' money that is spent, so the gift is not expensive, as long as the intention is there. The key is to make her feel your intention. You can give a more creative "small" gift. Here are a few ideas, I hope it will be helpful to you.
1 You can customize a small gift online on some gift websites, use her photo and add warm words to customize the gift, such as a color-changing cup, she will definitely like it.
2 Chocolate can express love. You can customize a DIY chocolate gift box on some gift websites. It is good to write your confession on the chocolate to let her know your intention. Even if she doesn't agree, your sincerity can move her. The packaging design is very delicate.
3 You can find out what cartoon characters she likes and give her a cartoon bouquet. The bouquet is lined with cartoon characters, which is very cute and very popular with girls. Flowers are easy to wither, but this gift will be kept for a longer time.