Wikipedia has a very interesting site that talks about all aspects of Music, including the history, type, genre, and theory. It has everything you could want to know about music. I use google a lot.
My interest, because I’m a retired Special Education Teacher is in Music therapy. This is used with individuals of all ages. They would have a variety of conditions, including: psychiatric disorders, medical problems, physical disabilities, sensory impairments, developmental disabilities, substance abuse issues, communication disorders, interpersonal problems, and aging. All of these conditions are found in a Special Education classroom.
It is also used to improve learning, build self-esteem, reduce stress, and support physical exercise, I learned to dance as a way of building my core muscles strength and used Salsa basic dance steps as my first dance. I find that my balance, even 20 years later, is excellent.
Listening to different types of music has long been used to help people deal with their emotions. In the 17th century, the scholar Robert Burton’s The Anatomy of Melancholy, argued that music and dance were critical in treating mental illness, especially melancholia. He noted that it has an “excellent power …to expel many other diseases” and he called it “a sovereign remedy against despair and melancholy.” In November 2006, Dr. Michael J. Crawford and his colleagues, found that music therapy also helped schizophrenic patients.
The Russians used Baroque music to help students retain information. I wrote a paper on it in college that I titled “Super Learning”. And I used it to help students in spelling. The teacher has to speak the letters in cadence with the music, so it takes some preparation time. But, my students quite often won spelling bees. And, they enjoyed the learning rather than being bored.
A review mentioned that music may be effective for improving sleep quality in adults with insomnia symptoms. I have studied up on insomnia also, and found that a regular book, soft music and low light in a room, except for your reading light, is very conducive to going to sleep in your chair.