"How do you say '小学生' in English?"
In English, "小学生" is simply translated as "elementary school student". This phrase refers to a student who is currently attending primary school, which is usually the first stage of education in many countries around the world. The term "elementary" here comes from the Latin word "elementarius", which means "of the elements" or "fundamental". Thus, an elementary school student is considered to be the foundation of their future education, as they are learning the basics that will form the basis for further study.