How many volumes are there in the history textbook of senior high school published by People's Education Press? Are they all elective courses?
Three compulsory courses, six compulsory courses, one compulsory course in political history, two compulsory courses in economic history, and three compulsory courses in ideological history, cultural history and scientific and technological history: a review of major historical reforms; Elective 2: Democratic Thought and Practice in Modern Society; Elective 3: War and Peace in the 20th Century; Elective 4: Comments on Chinese and foreign historical figures; Elective five: explore the mystery of history;