Elf unit is a daily academic test paper for primary school students, including grades one to six, covering three subjects: Chinese, mathematics and English.

Each set of papers is divided into units according to the learning content of each semester. Accurate content, in place, comprehensive knowledge points. It can effectively detect the primary school students' mastery of paragraph knowledge, timely check for missing parts, expand thinking and consolidate exercises, and comprehensively strengthen them in three aspects. It is a good choice after class.