Grade level of the students?
Immigration - are you referring specifically to legal immigration or are you also including illegal immigration?
You could include the impact on the other countries - Don't forget, if the doctors and engineers are immigrating here, those other countries are losing those positions... The impact is on both sides.
What is your teacher's opinion? How does your teacher grade? I ask this because some of the material you present may be opinionated, to a degree... There are teachers (good teachers) who respect the opinions of their students, and there are those who don't respect other opinions, and grade accordingly. (I learned that the hard way once.) Sometimes, you have a lot of freedom in which side of an issue you present; other times, you have to "play the game" and bias your information toward the teacher's biases (unfortunately.)