Here is a useful CRCT study guide that provides information, tips, and practice questions to prepare you for the test that is quickly approaching (Testing begins the first week of May). Remember, the CRCT is just another way you can "show what you know", and should not be something that brings you undue stress. The best way to prepare for the CRCT is to use your classtime appropriately and try your best on all you do during the school day.
UPDATE: I've also included a link in the Useful Links section to the right to a great online practice CRCT test. The login ID and Password are grade6.