Here’s Stephen’s suggestion:

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In collaboration with Lucas Gillispie, I have discovered an easy way for
you to upload homework assignments, and allow your students to receive
the assignment on the web, by-email, or by TEXT MESSAGE!!  To see it in
action, go to my classroom page and click on the link for homework
assignments.

A brief rundown of how it works:
1) Create a twitter account for your class (www.twitter.com)
2) Add a link to your account to your webpage
3) Post your homework assignments on twitter.  It takes about 10
seconds.  You just have to condense the assignment to 140 characters or
less.
4) Your students can view the assignments by clicking on the link from
your webpage, and they can then subscribe to receive text message
updates or e-mail updates, or just view it on the web.

It’s that easy.

Best part:  IT’S FREE.  Standard text messaging rates apply to the
students if they choose to receive text updates, but it costs you
nothing.
If you would like more information/an official training session on this,
stop by my classroom tomorrow after school.

Stephen

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Thanks Stephen!

-Lucas