The document discusses different types of musical instruments that are used in Grade 3 music class. It describes instruments as being either pitched or unpitched. Unpitched percussion instruments make sounds through being struck, shaken, or rubbed and include rhythm sticks, tambourine, castanets, claves, triangle, wood block, drum, maracas, sand blocks and cymbals. Pitched percussion instruments produce different musical notes and include the xylophone, timpani, glockenspiel, metallophone and lyre. The lesson introduces students to the different sounds made by various musical instruments.