# Educational and health developments in Buenos Aires > Live situation record from CLSTR: https://clstr.news/situations/educational-and-health-developments-in-buenos-aires > Updated: 2026-09-29T03:46:26.000Z. Sources: 9. Developments: 2. In early September 2026, the Legislature of the City of Buenos Aires unanimously approved a law making preschool education for three-year-olds mandatory. Set to take effect in 2027, the regulation includes a two-year transition period to expand infrastructure, secure budgetary resources, and integrate children from various assistance institutions into the official educational system. Later in the month, data from the Salud Escolar Bonaerense program revealed significant health concerns among students in Buenos Aires province schools. The program reported that 44% of evaluated first-graders have excess weight, with 17% identified as obese and 27% as overweight. Unicef attributed these trends to the consumption of processed foods and sugary drinks, as well as decreased physical activity. The program also identified needs for dental and ophthalmological care among the student population. ## Timeline ### 2026-09-29: Buenos Aires schools report 44% of first-graders have excess weight A health program in Buenos Aires province found that 44% of evaluated first-grade students have excess weight, with 17% classified as obese, prompting medical referrals and further evaluations. 2 sources. https://clstr.news/cluster/buenos-aires-schools-report-44-of-first-graders-have-excess-weight ### 2026-09-03: Buenos Aires mandates three-year-old preschool education The Buenos Aires City Legislature unanimously approved a law making three-year-old preschool education mandatory, effective 2027, to improve early childhood development and educational access. 7 sources. https://clstr.news/cluster/buenos-aires-mandates-three-year-old-preschool-education --- Cite as: Educational and health developments in Buenos Aires. CLSTR, https://clstr.news/situations/educational-and-health-developments-in-buenos-aires