Pictorial books and video aids make teaching interesting. Learning should be like a play. Children should be encouraged to observe atime table for study. The environment should be noise free and without disturbance.
I think teaching them in a way it will be easier for them to grasp what you are saying or teaching but at the same time never try to enforce them with your ideas or views and at the same time keep your patience and try to justify the questions they ask while you teach them....
I agree with Chinmoyji as making a child learn something is most difficult task since they respond the way they want.They can learn only if they are taught through colourful toys and loud letters, rhymes and interesting pictures.The teacher or the parents have to become a child to teach them.