Both Protestant and Catholic residents of Ontario's school districts have historically had the right to establish separate public elementary school boards and schools, and to levy taxes to support those schools, under most conditions. Only recently have all major political parties in Ontario agreed to funding Catholic public secondary schools through grade 13, in addition to the nondenominational public secondary schools. This agreement has led to questions about the levels and types of choice that are granted to various educational constituencies and about whether granting the rights to a separate school system for Catholics violates Canada's Charter of Rights and Freedoms or preserves the expressly stated constitutional rights of the Catholics. Court tests of these matters are pending. The Ontario situation suggests several propositions about choice in education that can serve as topics for discussion: (1) choice means exclusion, (2) choice reduces public control, (3) choice implies economic direction, (4) choice implies transfer of resources, (5) increased choice for some means decreased choice for others, (6) choice is not uniform, (7) choice depends on accessible information, (8) choice awakens religious animosities, and (9) the courts must decide who has choice. (PGD)