Precis 4

Scottish teenagers to receive sleep training in schools
http://www.bbc.co.uk/news/uk-scotland-12744698

The project created by the charity Sleep Scotland has an objective raise knowledge how sleep is very important for young people's emotional and physical comfort. The charity said watching television and using computers and mobile phones at night can prevent teenagers getting the nine hours of sleep they need. Lack of sleep can put people in a bad mood.
A pilot scheme in secondary schools in Glasgow was launched by the charity last year as part of the development of the new resource pack for teachers.
The charity wants to educate young people how to develop good sleeping habits, because they are difficult to concentrate.
The latest research shows sleep time for teenagers around the world has regularly dropped over the past 10 to 20 years.
Teenagers often believed they could make up for lack of sleep during the week by sleeping late at weekends. This is wrong thinking because lack of sleep during the week gives the same result as jet lag when they return to a school routine on Monday mornings.

prevent – to stop someone from doing something
Taking vitamins prevents various diseases.
We've prevented a big disaster.

scheme – a plan that developed by a government or large organization in order to provide a particular service for people
He came up with a crazy scheme to get rich quickly.
This is very interesting scheme.

development – the process of creating a new product or method
They were discussing the country's economic development.
He works in research and development for a large company.

charity - an organisation to which you give money so that it can give money and help to people who are poor or ill, or who nee advice and support
All the money they raise goes to charity.
This charity has a good opinion.

drop – to let something fall without intending to
Maybe we can drop this and go home?
He dropped studies in his fourth year.

launch – to start selling a new product or service to the public
A famous singer launches her new perfume line.
Last week they launched a new store.

principal – main, or most important
The principal rule is "Do not cheat".
This is very principal rule