The Listserv--A Tool for Communicating
The listserv is an e-mail tool that can be used for communication to a large group of recipients. Listservs are designed as e-mail sharing tools. They essentially do the same thing that one could do manually, by hand-entering lots of e-mail addresses, but putting everyone on to the listserv makes this process much easier for the user.
In their most pure form, anyone who is on the listserv CAN post to the listserv, and everyone who is on the listserv receives e-mails posted to the listserv. Often times, listservs are configured to automatically "reply to all", and while this can lead to an embarrassing accidental response to everyone, the idea is that it makes it very, very easy to share communication with everyone on the list.
Listservs can also be structured to function more like "subscription services," allowing the listserv's owner to send e-mails out to an entire group. Again, this could be done with the owner hand-entering each e-mail address. Now, though, the e-mail recipients can sign themselves up--simply by e-mailing the listserv!
Who would have a listserv in a school district? Well, over the last few years, lots of listservs have been developed in District 21 (see picture below). There are staff listservs, parent listservs, and even one student listserv!

In the case of the staff
listservs, these typically function as "electronic
meeting places" in which anyone on the list can post
to the list. For example, on the e-mail below from
Erin Schlenger to the Whitman listserv, she provides
other staff members at Whitman with some web-based
instructional resources that they may find useful.
Rather than getting a paper memo in their mailboxes,
paper and ink were saved, and more importantly, the
end user (recipient of the e-mail) can just click on
the links and go directly to the websites listed.

Our parent listservs have
been constructed as subscription services, providing
school staff members another way to communicate with
parents. We have listservs in action as E-mail
Subscription Services for Parents from a Kindergarten
classroom to middle school teams to entire schools.
Teams can use these to remind and update parents on
general information, such as the e-mail below from
Team Unity. At Riley, Cooper, and London, teams (and
a Kindergarten teacher) are using these tools on a
regular basis.

Likewise, Riley's
Learning Coach has established an electronic Parent
Subscription Service for GaTE parents at Riley.
Again, the use of a link in the communication allows
parents to go directly to the website of the National
Association for Gifted Children with just a click.

At the school level,
electronic subscription services for parents are
great for sending out reminders about upcoming school
events as well as for getting the word out quickly
about last minute changes, such as a meeting or event
cancellation due to weather. In those cases, while
not everyone will receive the e-mail, those that do
may communicate its contents to others via
word-of-mouth, thereby helping to spread the word.

Things to consider...
First, there are significant ethical issues in that
not all of our families have Internet access
available to them at home. In fact, many do not have
such access. Thus, other than those last minute
cancellations, anything that goes home in electronic
format should also go out in print to ensure that all
parents have access to critical information.
Second, it is important to understand that only one
person can "own" the listserv, and depending on the
type of listserv created, that individual may be the
only one who can post to the listserv. If teammates
provide useful information to share electronically,
this is not a significant burden for that person, but
if this person has to type every message from
scratch, this may prove unwieldy.
Third, once you start to communicate to parents using
such a tool, you should do so with some regularity.
It does not need to be weekly or on a perfect
schedule, but a pattern should present itself to
end-users in order to help them know what to expect
and when.
Fourth, if you begin a parent listserv, you will need
to plan a "launch" and market it to parents.
Encourage them to e-mail one another to sign up. It
is as simple as them sending an e-mail to:
whateverthelistservisnamed-on@ccsd21.org.
You will not need to hand-enter all of their e-mail
addresses. You will need to encourage them to
sign-up, though.
Fifth, if you initiate or are part of a staff
listserv, there should be clear rules communicated to
everyone on the listserv about how it is to be used,
and these rules do need to comply with our Acceptable
Use Policy.
Finally, it is cheap and easy! Using our existing
e-mail system, it only takes a few minutes to set-up
and use a listserv. If you have a need that a
listserv may help resolve, contact Jason
Klein.