The IDEA Oral Language Proficiency Test (IPT-I), forms C and D, aims to determine the level of English oral language proficiency as it relates to accepted levels of NonEnglish speaking (NES), limited English speaking (LES), and fluent English speaking (FES) designations in order to place students in an appropriate classroom setting. The test was designed for students in kindergarten through grade 6. The sample of test takers for standardization ranged from age 5 to age 12. The C and D forms are parallel tests that measure the correctness, appropriateness, and completeness of items through syntax, morphological structure, lexical content, and phonological structure. Students are tested individually by an examiner who should be bilingual in English and the native language of the student. Test materials are of good quality and are easy to use, and the test is simple to administer and score. Thirty-three school districts have participated in field tests, and reliability and validity have been supported by the field tests. The major weakness of the test is the difficulty of interpreting tables in the test manual. (Contains 3 references.) (SLD)