Over 3 months it's easy to forget something that you probably only had a tenuous grasp on. My father was a high school teacher and loathed Christmas break. "I

Over 3 months it's easy to forget something that you probably only had a tenuous grasp on. My father was a high school teacher and loathed Christmas break. "I spend 4 months pouring information in, and it's gone in 4 days." In addition, higher socioeconomic status children keep making progress during the summer.