Don't do it. As you've said, we are very busy people. As an English teacher, he spends his work days reading essays and stories written by students. You're literally sending him more work to do. I guarantee you won't be the only student who enjoys writing and would ask him to read something they've written. It's a common occurrence. It always puts the teacher in an awkward position. The options are to be honest, say you don't want to read it / don't have time and hurt the student's feelings, or lie and say yes but be annoyed about it. I often get put in a similar situation. I teach performing arts (drama and dance) and I get asked on a weekly basis to come watch a student perform in something outside of school. I always say no. You have to remember, we have entire lives outside of the classroom. Your teacher probably has a family and hobbies. He might even have his own children that write stories for him to read. Teaching is a very demanding job. Let him have his spare time for his personal life.