If you feel that your child is struggling in school, the first step is to figure out what your concerns are, and then talk to the right people at the school.
Here's what you can do:
1. Identify your areas of concern. What aspects of the school day is your child having trouble with?
2. Talk to your child's teacher or principal about your concerns.
3. It may help to observe your child in the classroom, then meet with the teacher. Sometimes simple changes in the daily routine, classroom set-up, or the teacher's approach can make a difference. The school may try these first to see if they work.
4. If these changes do not help, then you should get a referral for an evaluation. We'll tell you more.
When you ask for a referral, it's a good idea to put it in writing and save a copy.
Keep records of all your communications with the school! 
- Include emails, letters, phone calls, even conversations
- Make sure there's a date
- This can prove what you have asked for, and when
- It may help later on if you have to stick up for your rights
Source: Federation for Children with Special Needs