Another need that I hear about from teachers in my state is a book on our states history. 해당 주에서 어떤 책이 학년 수준에 맞게 쓰여졌는지, 그리고 그 책이 최신인지 여부를 살펴보세요. Writing self published programs that schools can use is also a matter of finding out what is needed.