Derived from the innovation of the program (General Education Program in Mathematics in 2018), the Grade 6 Textbook (Textbook) at the lower secondary level (2021-2022), the practice of teaching at schools popularization and requirements for innovation in teaching methods, this thesis analyzes and compares the content of Math 6 in Vietnamese including Chan troi sang tao, Canh Dieu, Ket noi tri thuc voi cuoc song and foreign textbooks Cambridge IGCS – British. According to that, we design and adjust a number of teaching contents of Interger chapter from Semester I Math Grade 6 suitable for corresponding students at lower secondary level in Vietnam.