Beijing Normal University Edition, New Senior High School, Volume 1, Basic Questions, Teaching Aids and Synchronous Textbooks Mathematics is compulsory one and compulsory four in Senior One, the main content of compulsory one is set and function, and the main content of compulsory four is trigonometric function and vector. Basic questions need to buy the first synchronous textbook of basic questions in the new high school edition of Beijing Normal University. Beijing Normal University is a key university directly under the Ministry of Education, and it is a famous institution with the main features of teacher education, educational science and basic disciplines of arts and sciences.