Principle 3: ensure the computer visualizationContent: this principle requires ensuring the relationship between sensory perception and reason in cognitive process math symbols. This is the way teaching fit specific thinking characteristics of young children. In the process of mathematical symbols for older, need for direct contact with the animals, the phenomenon of the world objectively on the basis of the maximum participation of the senses, to form in small children the primary mathematical symbols properly, on the basis of the young leads to the essential right.Measures to implement the principle:-Need to have the full Visual and objects they need to meet the requirements of teaching supplies.-The use of them in the process of guiding the child must meet certain requirements, such as use in time, consistent with the purpose of teaching, used in different ways depending on the task-based learning, change the map user to visually match the age of the child, do not abuse the use map content visually.-Use the form action with forms in the process of forming the mathematical symbol for small children.-Incorporate visual media presentation with words.-Work out for observation and capacity given the conclusions and reflect it verbally
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