How do I instill moral values in my kids to ensure they grow up to be good & reponsible children?
You should talk to your children every night and discuss things with them. Converse with them and explain things to them in an amicable manner. You need to pay attention to all the aspects of their development. They already have a good personality, but they need encouragement. You have to keep them in check and caution them.
Teach your children good habits. Every morning after they bathe, teach them to pray for world peace and salvation. If you can do this, it would mean that you have succeeded in instilling good values in them. Pray with them, so they will learn from you. This is your duty as a parent.
How can children improve their concentration in studies?
Everyday, you should also have them sing "Dada Bhagwan Na Aseem Jai Jai kar Ho" (Prayer to the Lord within). Many children have benefited from this and their concentration in their studies has improved. From a very young age, they will learn that God is within them.