An effective classroom, where teachers and students are communicating optimally, is dependent on using constructivist strategies, tools and practices. There are two major types of constructivism in the classroom: (1) Cognitive or individual constructivism depending on Piaget's theory, and (2) Social constructivism depending on Vygotsky's theory. Similarities include inquiry teaching methods and students creating concepts built on existing knowledge that are relevant and meaningful. Differences include language development theory where thinking precedes language for cognitive constructivism and language precedes thinking for the theory of social constructivism. Understanding communicative tools and strategies helps teachers to develop individual learning methods such as, discovery learning, and social interactive to develop peer collaboration.