以on my way to school为题写篇书面表达

On My Way to School
Today I got up very early in the morning.After I finished breakfast,I went to school.On my way to school I saw something lying on the ground.I picked it up and found it was a mobile phone.I was afraid I would be late for school.I had no time to wait for the owner.So I gave it to the policeman.
Shortly after I reached my school,the headmaster came to my class and praised me in front of the class.How could he knew all about it?I guess it must be the policeman who told him what I did.
I am very happy that I have done a good job.