RANDCRIS has been providing computer networking services to Valley charter schools since 2001. We offer services in networking, Red Hat Enterprise Linux, Microsoft Windows, imaging, virtualization, and locking down student workstations. We specialize in locking down Internet Access with Squid Proxy Server. Our method is simple, we create a white list of sites that you choose, and only allow those sites. You can add or delete sites at any time, which puts you in control of student learning. Even if an approved site streams content from another site, those outside sites will be blocked. Students learn quickly that traditional proxy servers can be defeated by utilizing online anonymous proxy servers; Squid does not allow these connections.