Are these correct

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.

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

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

To determine whether these sentences are correct, we can review them in terms of grammar and pronoun usage. Let's break it down:

1. Neither Jake nor Sue gets seasick.
This sentence is grammatically correct. The use of "neither" indicates that both Jake and Sue do not get seasick.

2. Are Jake and they ready with their math project?
This sentence seems to have a pronoun error. It would be more appropriate to say, "Are Jake and they ready for their math project?"

3. Every one of the students I spoke to said he/she liked his/her math class.
This sentence is grammatically correct. The use of "every one" indicates all the students, and the use of "he/she" and "his/her" ensures that the sentence is inclusive of both genders.

4. If a person loses his/her jacket, he/she can check the lost and found.
This sentence is grammatically correct. The use of "his/her" ensures that the sentence is inclusive of both genders.

5. Each of the boys likes to go out for ice cream after he wins a game.
This sentence is grammatically correct. The use of "each" indicates that every individual boy likes to go out for ice cream after winning a game.

6. My mom gives my sister and me money to spend at the mall.
This sentence is grammatically correct. The use of "me" is correct because it is the object form used after the preposition "to."

7. We kids think there is too much homework.
This sentence is grammatically correct. The use of "we" as the subject pronoun is appropriate.

8. David let Mark and him copy his science notes.
This sentence has a pronoun error. It would be more appropriate to say, "David let Mark and me copy his science notes."

So, out of the given sentences, sentences 1, 3, 4, 5, 6, and 7 are correct, while sentences 2 and 8 contain pronoun errors that need to be corrected.