Are these correct

Question

Neither Jake nor Sue gets seasick.
Are Jake and they ready with their math project?
Every one of the students I spoke to said he/she liked his/her math class.
If a person loses his/her jacket, he/she can check the lost and found.
Each of the boys likes to go out for ice cream after he wins a game.
My mom gives my sister and I money to spend at the mall.
We kids think there is too much homework.
David let Mark and him copy his science notes.

Answer 1

Please separate this and number it next time, but its okay.

1. Neither Jack nor Sue gets seasick.
- This has to be right because if you state neither jack nor sue get seasick then it wont make sense.

2. Are they and Jake ready with their math project? - Correct

3. Everyone of the students I spoke to said he/she like his/her math class.

4. If a person lose his/her jacket, he/she can check the lost and found.

5. Correct

6. Correct

7. It looks correct but something is off about it since stating we kids think there is too much homework.

8. I would take out and him. But otherwise, i think its right

Answer 2

My mom gives my sister and I money to spend at the mall.

Actually if you reword it to "My mom gives money TO my sister and TO me..." you will see that money is the direct object and ME is the indirect object. The corrct sentence, then, is:
"My mom gives my sister and me money to spend at the mall."

Sra