On last friday, August 3, Microsoft make avaliable to download the ISA 2006 Hands-on Labs.
This lab contains the following nine modules. You can complete each of these lab modules independent of the other modules.
Module A: Introduction to ISA Server
Module B: Configuring Outbound Internet Access
Module C: Publishing Web Servers and Other Servers
Module D: Publishing an Exchange Server
Module E: Enabling VPN Connections
Module F: ISA Server 2006 as Branch Office Gateway
Module G: Enterprise Management of ISA Servers
Module H: Configuring Load Balancing
Module I: Using Monitoring, Alerting and Logging
Download and source here.