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在生物教学中使用板画可以取得良好的教学效果,但不少教师感到困难,不敢运用,其实掌握了画法,多加练习,是完全可以掌握的。我在画版画时,主要采用先画轮廓后填充的办法,用赭石色、灰色、浅蓝色的色粉笔,先轻而细的画出外部几何形状,然后在这些几何形状中充填各种动物、植物的轮廓,最后填上局部器官。在画版画中选用的色粉笔以淡黄色、黄色、橙色、翠绿色、粉红色、朱红色为主,可使版画清晰,区別于板书,便于坐在教室后边的学生都能观察。下面举几个例子谈谈怎样画版画。 1.基线画法插图的基本线条以基线为基础。如画蜈蚣、带鱼(见下图)。蜈蚣用赭石色画外形和节肢,用黄色画环节。带鱼用橙色和赭石色。
The use of board drawing in biology teaching can achieve good teaching results. However, many teachers find it difficult to use them. In fact, they have mastered the techniques of drawing and practicing more. This is completely understandable. When I was drawing a print, I mainly used the method of painting the outline and then filling it with ocher, gray and light blue pastel to draw out the outer geometry with lightness and fineness, and then fill these geometric shapes with various animals , The outline of the plant, finally filled with local organs. The selected pastel pen in the printmaking is light yellow, yellow, orange, emerald, pink, and vermilion, which makes the print clear and distinct from the blackboard, which makes it easy for students sitting behind the classroom to observe it. Here are a few examples to talk about how to draw. 1. Baseline Illustration The basic line of the illustration is based on the baseline. Pictures centipedes, octopus (see below). Centipede with ocher color appearance and arthropods, painted with yellow links. Sea fish with orange and ocher colors.