Every trouble in a child's life is the result of something. Sometimes, simple unawareness in the childish psychology could cause many uncured psychological complexes and troubles. Every children psychologist suggests that it is better to prevent than to cure.
Daydreamers
They say that daydreamers are the future writers, creators, designers, modelers or just famous travelers. There are some reasons of your child's daydreaming. Perhaps, he/she is just happy right here and right now because of love, game expectations, new gift for the birthday... It is not awful as it is not a regular way of behavior and it is easy to draw a child's attention to another thing or situation. Another trouble is if daydreaming is the result of attention or memory disorder. A child who is inclined to daydreaming is usually very inattentive during the lessons; he/she forgets what he/she wants to do after a minute of a decision making, does not bring you what you ask to find, goes to the kitchen and returns with nothing or not-needed thing.
So, what's to do? Such disorders do not disappear by themselves, so, you have to make some efforts in order to let your child live full life and study better. Find some games which are to develop a child's ability to focus on the things and events, remember the numbers and words, concentrate on the result and others. If an elder kid has some troubles with studying, give an advice to make the certain time for dreaming. For example, after supper, when a child is able to stay alone at his/her room and write down the daily dreams. Some kids hate writing, so, they can share with some friends, draw, make a movie or any other creative work. It is very popular to start the rock or pop bands. Why not to apply this talent for collective music making?