ПРОВЕРТЕ ОШИБКИ ПОЖАЛУЙСТА!!!!!!
МНЕ ОЧЕНЬ НУЖНО,СРОЧНО,УМОЛЯЮ!!!!
ЕСЛИ НАШЛИ ОШУБКУ ТО ПИШИТЕ В ИСПРАВЛЕНОМ ВИДЕ!)

Думаю вот так было бы лучше, много ошибок, но я попыталась их исправить, прочитай:) :
On the first of September children go to school for the first time. They give flowers to teachers. Teachers congratulate pupils with  the beginning of new school year. Music plays on all area. The first of September - the main date for all school students. :)

On 1th of September first-formers go to school 1st time. They give a flowers to teachers. Teachers congratulate all pupils with starting school years. The music plays on the square. The 1st of September is the main day for beginner pupils. Вроде так.