The P22 Music Text Composition Generator allows any text to be converted into a musical composition. This composition is displayed in musical notation and simultaneously generated as a midi file.
Technology Institute for Music Education

Smithsonian Lesson Plans: The Music in Poetry:
The lessons in this issue of Smithsonian in Your Classroom introduce students to the rhythms of poetry. The focus in on two poetic forms that originated as forms of song: the ballad stanza, found throughout British and American literature, and the blues stanzas of Harlem Renaissance poet Langston Hughes. The exercises take poetry off the page and put it into terms of movement, physical space and, finally, music. At a special Web page, students can listen to musical ballads and blues from the catalog of Smithsonian Folkways Recordings. The ballads include early recordings of Bob Dylan and Suzanne Vega. The blues is heard in regional styles and as an element of early jazz.

glitchscape; The only way to describe this is you make a box and it plays a can make your own loop of music.  Just try it, it's cool!

Get Jazzed!
Developed for middle and high school audiences, Jazzed in Time follows the development of this great American art form. An interactive timeline, divided by decade, highlights events that helped shape jazz and illustrates the styles of each period (swing, bebop, fusion, etc.) through music and images. As they scroll through the decades, students learn about important moments and trends in U.S. history. By listening to music clips within this historical context, students can gain an in-depth understanding of a musical form that took root in American soil and made a global impact.
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Monkey Machine is a free web-based program that allows students to experiment with drum set sounds and rhythms.

The San Francisco Symphony's website Keeping Score is a comprehensive website full of educational materials about composers, scores, musical techniques, and symphonies.

The Science of Music, created by the folks at Exploratorium, is a fun series of lessons and activities about music. The Science of Music offers six exhibits containing interactive elements for students to use in exploring rhythms and sounds.

Classics for Kids, produced by Cincinnati Public Radio, offers lesson plans, podcasts, and games for teaching kids about classical music.

Sites that are great to use with Kids

Creatingmusic is an online creative music environment for children of all ages. It’s a place for youth to compose music, play with musical performance, engage in music games and solve music puzzles.

Carnegie Hall online produces an ever-changing variety of video and audio material. One interactive resource charts the many paths of African American musical history.
Creative Kids Central has a number of very engaging online activities related to classical music. I particularly like its “talking” and musical story on the 1001 Arabian Nights and its online video game on the composer Brahms.

Musicovery is a music-streaming site with an interface that works like a soundboard for adjusting your robot DJ’s musical taste. Sliders dial the mood from dark to positive and the tempo from fast to slow, while boxes allow you to check genres, including everything from funk to classica

KissTunes is a great web tool that lets you make some music and lets you give it a name and describe it. Then, you get a url address for your creation where others can then leave comments. You don’t even need to register! I’m definitely adding KissTunes to The Best Online Sites For Creating Music.

Using Songs In The English Classroom by Hans Mol, a teacher in Australia, is a short article that was  published in Humanising Language Teaching Magazine.  It gives a very good overview of different language-development activities that can be done with music.

English Child Songs has a ton of ….children’s songs in English that are sung with animation, and also show the lyrics.

Music Notation Training is a simple website on which students can practice recognizing music notes. The offers practice for both bass and treble clefs. To use the site just type the letters of the notes you see displayed before you. Each time you type a letter you can instantly see if you were right or wrong. There are a few progressions through the site so that you don't have the same sequence of notes all the time.