Parents will play classical music to their small children because they think that it will make their child intelligent. The child will not be smarter but if they were listening to a classical piece while putting together a puzzle they would put it together faster. Classical music clears your mind and when your mind is clear you work better at tasks.
Parents will put their baby through an experiment that is called the Mozart Effect. This experiment exposes the baby to classical music to see if the child's IQ will increase in the near future. The study of the Mozart Effect was studied in 1933 on a group of college students. After the students listened to the classical pieces they took a test and their test scores were improved. The Mozart Effect was proven to be successful. This information comes from Emiliana R. Simon-Thomas.
When you are writing a major essay or doing a big project that you want to do excellent work on, classical music can be helpful. The rhythm of some pieces of classical music is fast playing. When you listen to the music you work at a faster paste and make less mistakes. This is how you can make classical music useful.