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板图、板画、板书统称为“三板”教学,是教师的基本功,粉笔是生物“三板”教学的主要工具,而色彩则是生物“三板”教学的要素之一。有人曾做过这样的实验,一个生物信息的传递,如果单纯用语言需2.8秒,用素描图像传递需1.5秒,用彩色图像仅需0.9秒。实践表明,在板图、板画、板书中运用彩色粉笔,打动学生知觉的能力强,容易激发他们的学习兴趣和集中其注意力,可充分调动学生参与课堂教学过程,使生物学教学犹如一块磁铁吸引学生。所以彩色粉笔与生物“三板”教学有机结合,能缩短学生识记的时间,提高学习效率。
Board maps, board paintings, and board-based books are collectively referred to as “three-board” teaching and are the basic skills of teachers. Chalk is the main tool for the teaching of “three-board” biology, and color is one of the elements of the “three-board” teaching of biology. Some people have done such an experiment. A transfer of biological information requires 2.8 seconds for a simple language, 1.5 seconds for a sketch image, and 0.9 seconds for a color image. Practice has shown that the use of color chalk in board drawings, board paintings, and blackboard writing books has a strong ability to impress students’ perceptions, and it is easy to inspire their interest in learning and focus their attention. It can fully mobilize students to participate in the classroom teaching process, making biology teaching a piece of cake. Magnets attract students. Therefore, organic combination of color chalk and biological “three-board” teaching can shorten the time for students to remember and improve the efficiency of learning.