When I was very small, my teachers told me to let my parents sign their names on my homework so as to prove that they had assisted in doing my homework. Most schools have carried out this policy for a long time and now some people have doubted the necessity of parents' signature. They believed that it is both parents and teachers' duty to check children's homework, but the schools only leave this job to the parents. In my opinion, there is no need to sign the name, because there is no doubt that parents have the duty to help their children solve the problems, but some homework should be checked by teachers as they know how to better correct students' mistakes, then to better improve students' ability. So the best way to help students get improve lies in both parents and teachers' effort. 
在我很小的时候，我的老师叫我让我的父母在我的作业上签名，以证明他们辅导过我做作业。大部分学校都执行这一政策很长时间，而如今有人质疑父母签名的必要性。他们认为父母和教师都有责任检查孩子的作业，但学校只把这份工作留给父母。在我看来，是没有必要签名的，毫无疑问，父母有义务帮助孩子解决问题，但有些作业应由老师检查，因为他们清楚如何更好地纠正学生的错误，之后才能更好地提高学生的能力。所以帮助学生最好的方式在于父母和老师的共同努力。