I agree with Lauren's response, contacting the school is best. I strongly suggest that you contact your child's teacher or the schools reading resource specialist or reading coach to go over the scores. Often these scores can be difficult to interrupt. During the conference, it is a good time to see if the test scores match your child's everyday performance.
You'll probably have to contact your child's teacher or school for this information. Your child's teacher might be able to meet with you in person to go over this information. Or, the information might be online.