My son is regular practice in math's, but still concept is not clear, due to this his marks are getting very poor, can you give the suggestion how to better improvement and better understanding, please suggest.

Ans: Hello,
As you said he is not showing interest, hence unable to understand the basics.
Teacher has to make the subject interesting for him with good examples, quizzes, etc.
There is an online course EGANEET, search for it & take a basic subscription first, they make the subject lucid to understand.

See if it helps.

All the best.

Ans: Comprehension can improve after giving him small paragraphs, which can have multiple questions for him to answer. This is going to help him to comprehend the whole thing better and than he will be able to answer. Before writing he needs to focus more on his listening and reading skills.

Ans: Develop his reading skills by using lots of visuals initially. He should be breaking up the task given and form small questions to understand what is being written. This will definitely help him to develop his comprehension skills which would help him to go through the question paper with ease.

Ans: Hi!! Whenever a child is not understanding Maths, its always because of the adults ,who are unable to teach him in a way he or she understands. You are in luck , the summer holidays have begun, take one chapter at a time and explain the concepts to your child in a way he understands. Go to the very basic level and then increase the difficulty level.( be very encouraging and understanding, show lots of patience, the bigger goal to help him understand and score marks) Some children learn visually, some learn by listening, some learn by doing practically. It's called the VAK method , use all three ways of teaching your child. Complete the Maths syllabus before he joins back school. There will definitely be an improvement. You need to teach the child in a way he understands, remember you are the adult here. He doesn't understand by one method, try other ways of teaching a concept. You are in a generation where you can use internet, AI and other tools to help you learn to teach your child.

Ans: I think important is to understand the concepts then rote learning.
Make him understand the concepts by giving him the concept based learning, paired with activities and objective tests from each lesson before you start giving him more Lessons to learn. Divide the task into shorter achievable goals to develop the intrest.