A great idea for a lesson starter is to have the website agoogleaday.com on the interactive white board. If possible get a timer on the screen at the same time. Most IWBs have a widget for a timer, or you could always run a timer off a website like e.ggtimer.
Set it to go off 5-7 minutes after the students are first invited through the door.
This can often settle the class down before starting the actual tasks and is good practice for research. See how many finish before the time is up.
Maybe you could have a prize for the winner.