Please check my summary

1. Summarize the following extract. Your summary should be about 140 words long.

Call it Generation Groggy. In the US, at least once a week, 28% of high school students fall asleep in class, and 22% fall asleep doing homework, according to the survey released last week by the US National Sleep foundation. According to Amy Wolfson, sleep researcher and associate professor of psychology at College of the Holy Cross, that is the tip of the iceberg as "you know they aren't alert before they fall asleep and it is very alarming to me."

Sleep deprivation among youth is caused not only by puberty, which triggers changes in one's sleep cycle but also by environmental and lifestyle factors such as early school stars, a taste for caffeinated drinks and bedrooms that are full of sleep-postponing temptations such as cell phones, computers and televisions sets, sleep experts say. According to Dr Judy Owens, an expert in pediatric sleep disorders in Rhode Island, this is not all biological. The survey also showed that 97% had at least one electronic device in their rooms, which is a big problem. Researchers at other universities found plenty of evidence in their survey that adolescents were falling far short of recommended nine hours of sleep. Only about one in five adolescents between the ages of 11 and 17 gets the recommended nine hours of sleep per night and about half get less than eight hours on school nights. The total hours of sleep also declined with age. Sixth graders slept an average 8.4 hours per night while high school seniors slept 6.9 hours, two hours less than recommended. Young people are paying for the consequences, both academically and in terms of personal health problems, the researchers said. For instance, adolescents who get less sleep get worse grades than their pees who get at least nine hours of sleep. Eighty percent of the well-rested subjects reported getting As and Bs in school. Also, 28% of respondents reported they were too tired to exercise. Exercise is sorely missing in man children's lives these days with sports giving way to more sedentary activities such as watching TV or playing on the computer. Many children also may be too busy with other "more important pursuits" such as extra classes and enrichment classes to be involved in exercise. Owens noted that many studies have reported that the fewer hours of sleep an adolescent gets, the more likely they are to be obese or to suffer from mood disorders. Also, about half of teenage drivers in the survey said that they have driven while drowsy n the past year. Owens said that there are things that parents and their children can do to help kids get a better night's sleep. Adolescents should not drink caffeine after lunch and should not have electronic devices in their bedrooms. They should stick to a regular sleep schedule with an adequate number of hours of sleep and try not to deviate much from it on weekends. However, for some adolescents, making major changes in their sleep cycles may require extra help. Light therapy and the hormone melatonin sometimes can be used to restore more normal sleep cycles in young night owls, according to researchers.

My summary:

The extract sheds light on the chief causes of lack of sleep, its grave ramifications for one's health and solutions to facilitate a better night's sleep. Puberty is not the sole element causing sleep deprivation, but surrounding and lifestyle factors which encompass early school stars, a penchant for caffeinated beverages and bedrooms crawling with electronic devices. Research has shown that only roughly 20% 11-17-year-olds sleep for nine hours per night, and people sleep less when they grow. Sleep-deprived teenagers are paying for the consequences, both in terms of academic performance and physical and mental health issues. To get a better night's sleep, adolescents ought to abstain from drinking caffeine and having electronic devices in their bedrooms. Also, they should have a fixed sleep schedule with sufficient sleep hours, or use light therapy and the hormone melatonin to revert their sleep cycles back to normal.