In recognition of the fact that there are individual differences and preferences among teachers, the teachers at the Las Posas School in Camarillo, California were given the opportunity to use the methods they found most comfortable. This resulted in a variety of open classroom situations, with alternatives for parents, students, and teachers. This paper describes two open classroom situations presently in operation at Las Posas. One is a fifth/sixth grade program; the other combines first and second grades. Six classroom teachers work together in the intermediate program. Teaching, grouping, projects, and activities are done across grade levels and class lines. Classrooms are used in whatever way enhances the teaching and learning activity being done. The primary program is ungraded with no emphasis on age or grade. Two teachers are assisted by parent volunteers and cross-age tutors. Areas of study (language arts, math, spelling, printing, creative writing, research, science, vocabulary, geography, art, music, construction, cooking, sewing, drama, French, and Spanish) are individualized, with students working on a weekly contract basis. Appended to the paper are various forms used in the open classes. (DDO)