An example of these theories employed in the classroom would be teaching the life cycle of butterflies and their relationship to the environment and the developed world. First, the teacher should gain an understanding of students' prior knowledge to relate new information to existing schemas and to ensure their appropriate development through Piaget's stages. Piaget's theory is based on the level of cognitive understanding that should be achieved by students and on the comprehensibility and resolution methods they use for certain situations. This is an area that is taught in upper primary or lower secondary school. Therefore, students should have reached the concrete operational stage of cognitive development. (Reference). At this point, they should have the ability to solve problems related to concrete objects, however they have yet to develop the abstract and hypothetical thought processes of the formal operational phase. By engaging in group discussions and interactive activities, the teacher is able to gain an understanding of these prior patterns and the variation between them