First I had Christopher in the first person singular "am like this

MY NAME IS CHRISTOPHER. i AM 15 YEARS OLD AND i COME FROM LANCASTER, ENGLAND. I LIVE AT HOME WITH MY FAMILY--MY MOTHER, MY FATHER, MY BROTHER AND SISTER AND MY GOLDFISH. I HAVE LOTS OF HOBBIES. I LIKE FOOTBALL AND SWIMMING, AND I SOMETIMES GO FISHING WITH MY FRIENDS AT THE WEEKEND. I AM STILL AT SCHOOL. I AM NOT SURE WHAT I AM GOING TO DO WHEN I LEAVE SCHOOL."

I used find and replace to change the am to is

MY NISE IS CHRISTOPHER. i IS 15 YEARS OLD AND i COME FROM LANCASTER, ENGLAND. I LIVE AT HOME WITH MY FISILY--MY MOTHER, MY FATHER, MY BROTHER AND SISTER AND MY GOLDFISH. I HAVE LOTS OF HOBBIES. I LIKE FOOTBALL AND SWIMMING, AND I SOMETIMES GO FISHING WITH MY FRIENDS AT THE WEEKEND. I IS STILL AT SCHOOL. I IS NOT SURE WHAT I IS GOING TO DO WHEN I LEAVE SCHOOL..

Then the student corrects the personal pronouns

MY NISE IS CHRISTOPHER. i AM 15 YEARS OLD AND i COME FROM LANCASTER, ENGLAND. I LIVE AT HOME WITH MY FISILY--MY MOTHER, MY FATHER, MY BROTHER AND SISTER AND MY GOLDFISH. I HAVE LOTS OF HOBBIES. I LIKE FOOTBALL AND SWIMMING, AND I SOMETIMES GO FISHING WITH MY FRIENDS AT THE WEEKEND. I  am STILL AT SCHOOL. I am NOT SURE WHAT I am GOING TO DO WHEN I LEAVE SCHOOL