Final answer:
Manny's teacher thinks Manny's chances for a good future are uncertain due to the challenges he faces, including working after school and lack of support at home.
Step-by-step explanation:
Manny's teacher thinks that Manny's chances for a good future are uncertain due to the challenges he faces, including working after school and lack of support at home. The teacher may wish to help Manny, but due to various constraints, such as exhaustion and language barriers, they may not be able to provide the necessary support. It is not mentioned whether the teacher believes Manny will succeed or tutors him after school.