When do american indian children appear to do well in their formal education?

American Indian children appear to do well in their formal education "the first few years".

As it is seen the first few years go very well for American Indian children as there are minimum external factors are involved to affect their education, as they grow the external factors like cultural differences, language barriers etc. come along and in unfortunate cases affecting the child's education. 

It is state and federali really hope this  

Afine-grained igneous rock forms as a result of slow cooling.