Hi, I know you posted this ages ago, but we are having the same problem. Our son did nursery, Reception and Year 1 in the UK, and we put him into first grade when we moved back here last summer (because age-wise that's where he fit in). His MAPS scores were fine at in the fall, but went way down this spring. I'm shocked. I know he's bored in class and the work is not at all challenging, but I didn't see this coming.