The WJ III NU Tests of Achievement have two parallel forms (A and B) that are divided into two batteries—Standard and Extended. The Standard Battery includes tests 1 through 12 that provide a broad set of scores. The 10 tests in the Extended Battery provide more in-depth diagnostic information on specific academic strengths and weaknesses. Examiners can administer the Standard Battery either alone or with the Extended Battery. Practitioners use the WJ III NU Tests of Achievement to help assess students for learning disabilities and determine if they need special services. IDEA 2004 requires the use of a variety of assessment tools and strategies to gather relevant, functional, developmental, and academic information about the student. The WJ III NU Tests of Achievement include tests and clusters that directly parallel those outlined by IDEA and provide sound procedures for determining learning variances between abilities and achievement.