The MCA Student Practice Test is very similar to what your child will take for the MCA's this year. In order to do sample problems, you must use Firefox as your browser. Firefox is a free download if you do not have it. The practice tests for Math and Reading are good for kids to work on, but it will not give them a score or in anyway show correct or incorrect answers.
MCA Student Item Samplers
The following link has been set up with direct assignments for the 6th grade students. There are video directions, student practice activities, and often times a quiz. These assignments are based on the Standards and are great preparation for the MCA III's.