The article discusses the areas of work of one of the leading gymnasiums of St. Petersburg in the framework of the Concept of Sustainable Development. It is based on both established approaches - environmental, social, economic, cultural, and technological - developed by the gymnasium. As part of the greening of technology, the gymnasium has introduced a methodology for working with free mobile applications based on augmented reality working on mobile gadgets with all operating systems. Sustainable development of an educational organization is considered much broader than work exclusively on environmental education.