Constructivism
Psychogenetic
Sociocultural
Constructivism is based on the idea that people actively construct or make their own knowledge, and that reality is determined by your experiences as a learner. Basically, learners use their previous knowledge as a foundation and build on it with new things that they learn. 
Vygotsky's sociocultural theory views human development as a socially mediated process in which children acquire their cultural values, beliefs, and problem-solving strategies through collaborative dialogues with more knowledgeable members of society.
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Vygotsky's theory is comprised of concepts such as culture-specific tools, private speech, and the Zone of Proximal Development.
Cognitive constructivism based on the work of Jean Piaget 
Social constructivism based on the work of Lev Vygotsky 
Cognitive constructivism states knowledge is something that is actively constructed by learners based on their existing cognitive structures. Therefore, learning is relative to their stage of cognitive development.
Two of the key components which create the construction of an individual's new knowledge are accommodation and assimilation. Assimilating causes an individual to incorporate new experiences into the old experiences. Accommodation is reframing the world and new experiences into the mental capacity already present. Individuals conceive a particular fashion in which the world operates. When things do not operate within that context, they must accommodate and reframing the expectations with the outcomes.
Constructivism is considered part of the cognitive revolution, an intellectual movement that began in the 1950s
Principles of constructivism.
Learning takes place in the personal zone of cognitive development between what is already known, what is not known and what is desired to be known (Vygotsky).
Knowledge is constructed: that learners build new knowledge upon the foundation of previous learning.
People learn to learn, as they learn.
Learning is an active process.
Learning is a social activity.
Learning is contextual.
Knowledge is personal.
Learning exists in the mind.
Motivation is key to learning
Conclusion
Constructivism is a theory that encompasses many important aspects to put into practice in the classroom, such as prior knowledge, the student's cognitive stage, collaborative work, context, motivation and where the student is active in their learning processes. A very significant strategy is the project work where the above mentioned aspects are put into practice and also allows to work on different topics and helps to work collaboratively favoring multiple intelligences, peer tutoring and also motivation which is very important for constructivists and Maslow.The perspectives of constructivism Psychogenetic and Sociocultural constructivism have more meaning if they work together and are enriched with other theories, in education plans of study take into account the stages of development of piaget to develop activities according to age, however, in practice it is enriched with the theory of vygotsky to develop activities that include the context and culture of the student, and favoring the scaffolding where the teacher or other people can participate. In my case I work with different elementary grades and the project work and tutoring is very functional and interesting for students of different ages.
