Environmental studies describe the interrelationships among organisms, the environment and all the factors, which influence life on earth, including atmospheric conditions, food chains, the water cycle, etc. It is a basic science about our earth and its daily activities, and therefore, this science is important for everyone. Pedagogical principles in teaching-learning of EVS :Active participation of children is important in constructing knowledge. Opportunities should be given for observations using a variety of learning resources such as visits to parks, museums, water bodies and various places in the community. If learning occurs beyond the walls of classrooms, the quality of learning is better.Efforts should be made by teachers to relate the childs local knowledge to the school knowledge - this would discourage rote memorization and encourage developmentally age-appropriate learning in EVS.Children in early grades learn through a variety of ways, therefore opportunities should be given to explore, observe, draw, categorise, discuss/ speak, ask questions and enlist, etc. to develop various skills /processes.Pictures /illustrations play a very important role in EVS learning as these support the written material.Activities and questions play an important role as these provide opportunities for children to express themselves. Each child learns at his /her own pace. The challenge before the teacher is to handle multilevel groups so as to address the needs of children including the differently challenged group of children. Teachers should design activities for these children in such a manner so that they can be engaged meaningfully while doing activities with their peer group.Assessment for learning (formative assessment), should be used as an inbuilt part of the teaching-learning process so as to identify and address learning gaps in a timely manner. The real purpose of assessment of learning (summative assessment) is not to compare the progress of children but to track the progress of each child regularly. This assessment should be done periodically by using a variety of modes (not restricted to the written mode only).The teacher should maintain a portfolio of each child and this document should be used as an assessment tool to know the progress of each child over a period of time.Teachers must understand that learning is a mutual process. Children learn from each other and a teacher also learns from children, particularly to understand their needs.EVS learning is also concerned with the inculcation of important values/ attitudes and appreciation. It fosters an appreciation of the interrelationship between all living organisms and their environments and encourages children to become active agents in the conservation of the environment.EVS learning cultivates respect for cultural diversity and sensitizes children regarding minorities and people with special needs. Prejudices and discrimination are challenged, while respect and mutual understanding are promoted.Hence, we conclude that one of the important pedagogical principle of environmental studies is ?the use of the environment as a learning resource.