Before 1970, no mixed-age groups existed in Swedish nursery schools. By 1991, 43 percent of children enrolled in nursery school were in mixed-age groups of ages 1 to 6 years, and 37 percent were in groups of children ages 3 to 6 years. Mixed-age groups are assumed to have advantages, including positive influences on learning and social…

A school system in Cape Town, South Africa, developed a program called the "Combined Magnet Class" to serve gifted pupils from standards (grades) 3-5 in one classroom. Changes to the standard curriculum were made, and a pupil-determined pace was adopted. The pupils studied English, Afrikaans, and mathematics using a syllabus, for…