Sleep is important for the body to rest and repair its systems. This happens in two stages, Non Rapid Eye Movement Sleep and Rapid Eye Movement Sleep. Non REM sleep occurs in four stages and is vital to get the body systems back to being rested, this process is called homeostasis. A growing Hormone is also produced during Non REM sleep, which causes children to grow and develop. REM Sleep allows us to dream, and studies have shown that dreaming allows us to learn. We find that people who don't dream or get REM sleep, will not learn as efficiently.