You can help your child do better on tests by showing uim or her a brain gym activty called the cross crawl.  It's fun to do it with music in the background for fun.  I've had kids skip to the music.  When the left foot is off the ground, the right hand is in the air.  When the right foot is off the ground, the left hand is on the air.  This takes concentration and practice for some.

This gets both sides of the brain working together and will help you feel more open to learning new things and being relaxed.