Hmmm. That sounds like a symptom of something else going on with him at school. Is he being bullied? It's not uncommon or a child who is being bullied to not want to go to school, either by claiming to be sick or skipping school secretly on their own.
And the sad thing is that most children won't speak up about being bullied either for fear of making it worse.
And the sad thing is that most children won't speak up about being bullied either for fear of making it worse.