With the increase in the world’s population, the need for living spaces, food, clean water, clean air, and energy has also increased. The finite nature of the world’s resources has led to problems such as environmental pollution, hunger, famine, scarcity, diseases, global warming, and climate change, which in turn indirectly lead to problems such as terrorism, war, civil unrest, migration, economic problems, unemployment, income inequality, and injustice. Domestic problems have escalated to regional and global problems. Regardless of the level of their contribution to the problem, all countries in the world have been equally affected by the consequences of global warming. For example, the impact of climate change, one of the consequences of global warming, is felt all over the world. Problems resulting from changes in the atmosphere, land degradation, and disturbance in the seas affect all living and nonliving things in nature.
Joint efforts to address global challenges should consider regional and global dynamics. The meaningful fight against these problems started in the 1940s with the Green Revolution. This initiative, which continued from the 1940s to the 1970s, aimed to increase global agricultural production to meet the needs of the population. However, the increased use of chemical fertilizers and chemicals for pests, water consumption, and deforestation for farmland expansion contributed to the emergence of the global problems being faced today. The resolution agreed upon in the United Nations (UN) Conference on the Human Environment in 1972 emphasized the need to place environmental issues at the forefront of development and to cooperate in resolving environmental issues.
Individuals, institutions, and organizations should adopt environment-friendly policies to create a livable world for future generations and meet the needs of the current one. In 1987, “Sustainable Development (SD)” became a topic of emphasis for the UN, and in the Brundtland report, SD was defined as “development that meets the needs of the present without compromising the ability of future generations to meet their own needs” (Brundtland, 1987). Then, in 1992, a roadmap for sustainability was laid out at the UN Conference on Environment and Development. In 1997, the Kyoto Protocol, which operationalizes the UN Framework Convention on Climate Change, was signed and the first international framework on sustainability was put into practice. In 2000, with the declaration of the Millennium Development Goals, the UN identified the “global aims of SD,” and in 2015, the 2030 Agenda for Sustainable Development was adopted by all UN member states to eliminate poverty, protect the planet from degradation, and reduce equality and injustice. In this context, the sustainable development goals (SDGs) of no poverty, zero hunger, good health and well-being, quality education, gender equality, clean water and sanitation, affordable and clean energy, decent work and economic growth, industrial innovation and infrastructure, reduced inequalities, sustainable cities and communities, responsible consumption and production, climate action, aquatic life, life on land, peace, justice and strong institutions, and partnerships for the goals were adopted by UN member states (UNESCO, 2015).
Sustainable Development in Education
Countries, institutions, organizations, and individuals have a role to play in achieving SD. The UN Conference on Environment and Development (also known as the “Earth Summit”) held in Rio de Janeiro in 1992 emphasized that a better, peaceful, and sustainable future starts with education. The 2002 World Summit on Sustainable Development held in Johannesburg emphasized that education is a priority in forming a social and intellectual basis for the implementation of SD principles (Nasibulina, 2015). In sustainability education, students should be provided with knowledge that will enable them to build strategies that ensure our present and future well-being (Bell, 2016). Although there is no single pedagogical style for teaching sustainability, participatory and experimental approaches that lead to a change in students’ opinions and actions and make meaningful differences stand out.
The 1992 Earth Summit held in Rio emphasized the importance of education, training, and raising public awareness for achieving SD. At the conference, countries were called to integrate the social, economic, and environmental dimensions of development into formal education curricula. Courses offered to students at school are directly or indirectly connected with different dimensions of sustainability. Consequently, sustainability can be integrated into the curricula. To improve sustainability education, sustainability-related topics across all relevant disciplines can be added to the curricula (Tilbury and Wortman, 2004).
Efficiency is defined as the ratio of inputs to outputs (Prokopenko, 2001). This definition is adequate in the context of economics, but it is insufficient to express educational efficiency. Although the ratio of those entering the education system to those leaving the education system may be an indicator of quantitative efficiency, it does not fully reflect the quality of education. Efficiency in education has two dimensions: “internal” and “external.” Internal efficiency refers to the relationship between quantitative inputs and nonmonetary outcomes, whereas external efficiency refers to the relationship between qualitative inputs and monetary outcomes.
Internal efficiency is represented by statistical data based on the number of students who enter the educational system and successfully complete it (Aydın, 1988) or whether the desired number of students graduate with the desired qualifications (Bülbül, 1983). Internal efficiency treats material and nonmaterial resources, pedagogical practices, and the processes related to the conduct of education as inputs. Material inputs include equipment, textbooks, teaching materials, desks, and classrooms. Nonmaterial inputs include cognitive, affective, and psychomotor domains of learning, culture, and level of readiness.
External efficiency in education refers to the extent to which an education system contributes to the achievement of socioeconomic and sociocultural objectives. In other words, it measures the role of education in realizing students’ objective of welfare maximization. External efficiency looks at how successful the education system is in producing positive outputs and consequently enabling students to work at better jobs, get higher salaries (Santín & Sicilia, 2014), and reach higher levels of welfare. Inputs of external efficiency are nonmaterial, pedagogical practices.
Positive outcomes in internal and external efficiency of education are reflected positively on SD. Accordingly, to sustainably shape the future, each individual should acquire a set of necessary knowledge, skills, attitudes, and values (UNESCO, 2014). Environmental, social, and economic sustainability aims to make the world more livable in the present and future. Education for sustainable development requires a new learning system that changes the way we live (Ojala, 2016; Wamsler et al., 2018). The internal and external efficiencies of an educational system in producing the desired outputs contribute to the environmental, social, and economic development of individuals, institutions, and countries worldwide. Previous relevant studies have concluded that investments made by a country to improve the educational system contribute to its SD and economic growth (Barro and Lee, 1996, 2012; Hanushek & Kimko, 2000; De la Fuente, 2011; Hanushek & Woessmann, 2012).
Accordingly, the learning objectives in the 9th-, 10th-, 11th-, and 12th-grade physics curricula that are related to SD and EE will be identified and classified in line with RBT and the SDGs established by the UN to be achieved in the period between 2015 and 2030 (UNESCO, 2015).