A test and other evaluation material must be selected and administered so as not to be racially, culturally, or sexually discriminatory and must be administered in the student’s primary language or other mode of communication. The test must also be validated for the specific purpose for which it is used. In addition, testing must assess specific areas of educational need and not merely produce a single general intelligence quotient. No single procedure can be used as the sole criterion for determining an appropriate educational program for the student. Finally, for a student with impaired sensory, manual, or speaking skills, the testing must ensure that the results accurately reflect the student’s aptitude or achievement level, and not the student’s impaired skills, unless those skills are to be measured by the testing. [20 U.S.C. Sec. 1414(b); 34 C.F.R. Sec. 300.304; Cal. Ed. Code Sec. 56320.]