A Bicycle Built for Two

I feel Noteflight is very beneficial towards music education.  Finding a free music notation website is very rare but it is a great tool to use in classes.  Since it is free, the school does not have to purchase software for your computer labs.  It can also be great for smaller notation assignments like duets, warm-ups, etudes, etc. that you might use in general music classes.  Students will be able to notate fast with this program.