Useful. The "186" big trick system embodies the wisdom of all senior high school teachers and researchers in homework help, and homework help's big trick is helpful for children's learning. 186 big trick system, there are not only famous scholars who graduated from Qingbei, but also skilled craftsmen in top normal universities such as Beijing Normal University, and even experienced veterans with more than ten or even twenty years of teaching experience. Every trick has been repeatedly discussed and polished. I want to know whether this trick is suitable for students, what difficulties students have in accepting it, and what form is the best for them.