The results of the previous test show that the simple circuit of the primary school students in our country contains all kinds of thinking models except current conservation model. Such as the choice of a, C, AC or direction of current logo is only from a wire point to lighting of the students think "lighting themselves without electricity, electric from the battery side direction lighting, lighting will be bright, belongs to the" unipolar model ". Choose B, D, e, and combinations thereof, and current direction signs for two wire current opposite students think "on both sides of the battery to generate electricity, on both sides of the current to lighting, shine lighting, which belongs to the" collision model ". Selection for B, D, E and its combination,And current direction identified as the two wires in the same direction students demonstrate two possible conceptual model: A is the electricity from the battery side began, through a wire spread to lighting, and then recycled to the cell on the other side, but not explicitly electricity is consumed, known as "circular model"; another is "electric from the battery side direction lighting, the bulb lights up, then left and then flows back into the battery, which belongs to the" current consumption model ". In addition, there are individual students choose abce, think "electric black point from the lighting into lighting" is to ensure that the focus of the normal work of the circuit, and students in the circulation model based on further define the current direction,Such as the "electricity from the cathode to anode issue". Test and an interview were not on the size of the battery on both sides of the current question, therefore cannot judge whether former student concept in full compliance with current conservation model, students holding cycle model point of view, the concept understanding as close as possible to the conservation of current type.
data analysis shows that to "unipolar model" of the concept of students accounted for about 4.60%, to "collision model" of the concept of students accounted for about 22.99%, to "current consumption model" or "cycle model" concept before students about 20.69%). In addition, nearly half of the students in the current direction of the current direction of vague or not to answer,The former concept is difficult to clearly classify.
in another research about the "ability of the three primary science. After testing the test problem is used to investigate the 10 urban and rural schools a total of 200 fifth grade students of the circuit current concepts, also came to a similar conclusion: to" unipolar model "view of students accounted for 16.0%," collision model accounted for 50.50%, the cycle model accounted for 33.5%. Can be seen in the experience of simple circuit after learning, the former concept is still widespread.
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