Yippee!
This is sometimes a difference between what a child will do at home, and what they will do at school, on a test. Be sure to do some review before the test. ((Hothousing helps schools understand children.)) 3rd graders don't usually do "Finals" and that's what this is like.
Is third grade level what you've been doing at home, or going further?
Love and More Love,
Trin

Coaching available, at SchoolSuccessSolutions.com