It is better to "fully understand the primary school textbooks" or "practice one lesson at a time".

Primary school textbooks and a complete solution of one lesson and one practice are currently used by primary school students. The complete solution of primary school textbooks is suitable for pre-class preparation, and one lesson and one practice are suitable for after-class practice.

"Complete Answer to Primary School Textbooks" is mainly aimed at splitting and explaining the knowledge points in textbooks in detail. "One lesson and one practice" is an intensive training for each lesson, which is as difficult as the school workbook.