diagnostic reading assessment

(i) valid, reliable, and based on scientifically based reading research; and

(ii) used for the purpose of—

(I) identifying a child's specific areas of strengths and weaknesses so that the child has learned to read by the end of grade 3;

(II) determining any difficulties that a child may have in learning to read and the potential cause of such difficulties; and

(III) helping to determine possible reading intervention strategies and related special needs.