私と同じ英語レベルの他の生徒はどんな教材を使っていますかって英語でなんて言うの？

In the first sentence you are asking about the material that students of your level are attracted to and use.
In the second sentence you are asking your teacher what is the 'best' material for students at your stage of learning. This question relies more on the teacher's experience with different types of students, together with a wide knowledge of available material.
The last sentence is simply a request to be advised what is best for you.

*At this level which material should i use? - In education, the learning process is done in different stages/levels. There's beginners, intermediate, advanced. Each stage carries different material
A: I'm learning English for the first time, which material should i use?
B: Beginners tutorials.

Many ways to ask this question. All would be sufficient to start a conversation about materials used and appropriateness of your owns materials

If something is "appropriate" it is the right thing for a situation, which is this case, would be the materials. By using the phrase "do you think" you make it clear that you are asking for an opinion from your teacher. I hope that this helps. :)

Your are asking what materials they would recommend for someone at your level of understanding to study.

These questions are asking a tutor or teacher what materials such as textbooks, websites and other resources for education you need, and asking what other students at the same 'level' of English, 'level' being the same skill level as ones self.
"Is this the same material that other students that are my level use?"

You can use any of the three questions to ask your teacher about other students he/she teaches at your level. Your teacher will know what you are asking and he/she will be able to assist you accordingly.

It is good to want to know what other students do at your level, but you must remember that it is not to say that the material will be the same for you. You might be higher than the other students or lower, so it will be equally important for you to ask your teacher to assess your level and to make recommendations if needed to suit your needs.

When you want to ask your teacher what kind of material students at your level usually use; then you may ask this in the following ways:
-What material do other students on my level usually use?
-I'd like to know what kind of material do other students at my level usually use.