"CIPA does not require the tracking of Internet use by minors or adults."

For compliance, schools are required to address the safety and security of minors when using email, ... But, that does not prescribe the logging of activity.

Source: http://www.fcc.gov/cgb/consumerfacts/cipa.html

 From http://www.ifea.net/cipa.pdf

TITLE XVII--CHILDREN'S INTERNET PROTECTION
   SEC. 1701. SHORT TITLE.
    This title may be cited as the ``Children's Internet Protection Act''.
   SEC. 1702. DISCLAIMERS.
    (a) DISCLAIMER REGARDING CONTENT.--Nothing in this title or the
amendments made by this title shall be construed to prohibit a local
educational agency, elementary or secondary school, or library from blocking access on the
Internet on computers owned or operated by that agency, school, or library to any
content other than content covered by this title or the amendments made by this title.
    (b) DISCLAIMER REGARDING PRIVACY.--Nothing in this title or the
amendments made by this title shall be construed to require the tracking
of Internet use by any identifiable minor or adult user.

Sec 1702(b) indicates that it doesn't need to be tracked. If it doesn't
need to be tracked, then, logically, it cannot be archived.