The document provides information about different types of musical instruments. It includes a table listing strings, woodwinds, brass, and percussion instruments. It then has blanks to fill in about orchestral music, how the harp is sometimes played, examples of brass instruments, what percussion instruments are made of, examples of keyboard instruments, and how guitars are often played in bands. The second part provides sentences with missing commas and asks the reader to add commas in a series to two original sentences.