I would talk with the other teachers who are sending him into the classroom. By approaching the issue as wanting to work with them instead of accusing them of interrupting your instruction, you may be able to come to a solution. Since you are the ESOL teacher, they might take some suggestions from you about how to modify the curriculum so that the student gets some help in the general classroom.

I’m not sure that approaching the other teachers is the best approach. They may feel as though you are blaming them, accusing them, or making assumptions about their teaching. Maybe the other teachers have arraigned for the student to see the ESOL teacher in certain instances. I would continue to help the student as much as possible, and monitor the situation until your intervention is definitely needed.

I would bring the student into my class full time. Clearly he is looking to me for guidance, and rather than have him distract me whilst teaching other students, I want to have him on the same track with them. That will give me the time I need to address his language issues and instructional needs. I will notify the principal and his parents about this too, although I will go ahead and keep helping him even if they tell me I am wrong. It is my duty as a teacher to assist people who are reaching out to me.