Q: How to develop kids focus/concentrate behavior ?

If your child seems unfocused or unable to concentrate, resist the urge to nag and complain about it. Instead, take positive action to help them achieve success. You can’t force your child to focus, but you can help them develop ways to get back on track when their brains fog over. Here’s how you can do it.
 
Have them take an exercise break
Sitting for too long is never a good idea. Besides, your child won’t learn anything new being shackled to a desk all day. Get them to participate in some sort of activity. Bonus: do it together so you can spend more time with your child. Ideally, this should be done before your child needs to get busy on schoolwork.
 
Get rid of all technology unless it’s needed for an assignment
Turn off the TV and put all smartphones and tablets away. Unless a computer is needed for the completion of an assignment, all blue screens should be turned off. Your child should work in an area conducive to studying with zero distractions.
 
Make an easy-to-manage list
Balancing school and other responsibilities is stressful for kids. Help them learn organizational skills by making a list they can tackle with all their responsibilities for the week included on it.
 
Don’t become a distraction yourself
Practice what you preach. If you say now is time to do homework, don’t start talking your child’s ear off about his school day. Wait until he looks like he needs a break to talk to him.
 
Encourage breaks
Experts say you only remember the first and last things you read when you’re studying. Your child should be working in 10 to 20 minute blocks (the younger the child, the shorter the study block) before taking a break. During that break, your child should move around and walk it off, have a glass of water or milk, use the bathroom, or just take a simple moment to refocus. Once break time is up, your child should get back to work. The key here is for your child to relax so that when he returns to his studies, he feels refreshed and ready to work again.
 
Most of all, avoid harping on your child. Nobody is perfect. If your child seems to be struggling with homework or a certain subject, take a non-threatening approach to find out why without getting angry. Be as open as possible and listen to what your child says so you can help them find the right solution that will allow them to stay focused on their path to success.