Adolescence is a word originated from Latin, and means 'to grow up'. Adolescent kids are usually between the ages of 13 and 19. For more about adolescence, you can view this page - en.wikipedia.org/wiki/Adolescence

When you find your kids become difficult to deal with, its very important to understand the behaviour associated with adolescence. There are lots discussion and information available on the internet. The following sites may give you a good start: