You need to be careful of your capitalization and spacing. Also, The last sentence could well be split into two sentences - rewrite.topic :Write a report for the director, exlaining[explaining] why mobile phone [phones] are necessary for student [students] and recommending ways in which thier [their] use could be controlled. **note write your report in 120-180words.
This report explains why mobile phones are important for students,and makes recommendations about thier use in the school.the information comes from students and thier parents.
necessary [Capitalization needed]
mobile [First word in a sentence must be capitalized; - either keep to mobiles or mobile phones. You are inconsistent in this.] are good communication [wrong word to use here - you could use a single word, like vital, essential, valuable] for students to keep in touch with parents,friends and relatives.If [space after punctuation] there were an emergency,it would be difficult for parents to contact their children.In such a situation, a mobile is very useful,almost necessary.Parents provide children with mobile phones so they can keeps tabs on them and parents [do not need parents twice in this sentence] can reminds[remind] them not to saty[stay] out too late.
mobile phone are [A mobile phone is] not only [a] good communication skill [tool would be a better word]but it helps us having a calculator which can be useful in mathematics,physics and chemistry lessons and you can also use daily reminder for your timetabale[timetable]. [I am sure you can, but you do not indicate why the mobile phone is useful for this]
students shoulds[should] either turn off or put on silent mode their mobile phone during the lesson in class [lessons OR class].
Student or Learner