A recent survey shows that the health of the students in our school has been going from bad to worse in the past three years . The number of nearsighted students has increased from 78.2% in 2002 to 92.5% in 2005 , while that of overweight , from 36% to 52.4%. Nearly 10% more students lack sleep because of more homework to do . Besides , over 15% more students become mentally unhealthy .

To improve students’ health , we call for less homework . Only in this way can students get plenty of sleep and meanwhile prevent them from being nearsighted . Proper diets and exercise should also be paid attention to so that they won’t easily put on weight . With their heavy burdens removed , students can then keep in normal mental health .