Here is a great list of resources to use at home.
You can learn more about the instruments of the orchestra and band on this interactive website, sponsored by the Nashville Symphony.
The Canadian National Arts Centre offers a comprehensive site
that includes a short biography of Tchaikovsky and video of the
National Arts Centre Orchestra playing an excerpt from his
Symphony No. 4 in F Minor, Op. 36.
The Dallas Symphony Orchestra helps students identify the
instruments of the orchestra through solo audio clips and
performances with the orchestra.
The Kennedy Center ArtsEdge program offers two interactive
modules for budding orchestral experts. Perfect Pitch moves the
orchestra to a baseball field, where students can see and hear
the development of the orchestra from the Baroque period through
today. Xploring Xtremes focuses on dynamics and tempo.
For more detailed descriptions of the elements of classical music,
try Essentials of Music from W. W. Norton.
The mission of St. Matthew Catholic School is to educate the whole student by Christ centered formation in a Catholic environment leading them to do God's will in this world so as to be happy with Him in the next.