This report describes Head Start classroom activity, contains data on the children from a testing program, and includes teacher ratings of pupils on a Classroom Adjustment Checklist. (Individual data is being preserved for follow-up studies.) Classroom observations were made in 13 of 27 Head Start classrooms, while testing activities and teacher ratings of pupil growth went on in all 27. Classroom observations were made on the basis of the Goodman time-sampled observation technique and yielded information on such items as pupil activities, adult activities, use of instructional materials, and pupil-adult ratio. The pupil testing program consisted of the Peabody Language Development Test, the Vocabulary, Sentences, and Geometric Design Subtests of the WPPSI, the Dailey Language Facility Test, and the Test of Basic Information. The Classroom Adjustment Checklist, developed for this report, describes such variables as social interaction, self-control, quality and fluency of speech, independence, and responsibility. [Not available in hard copy due to marginal legibility of original document.] (MH)