直观教学是中学生物教学中最重要的教学原则之一,几乎所有的生物课都不能脱离这一原则。在中学生物教学中,直观教学手段是多种多种的,这里着重谈谈贴绒教具在生物教学中的作用。所谓贴绒教具是在挂图、剪贴图等直观教具基础上发展起来的,在教学中的作用又远远超出了挂图等直观教具。贴绒教具的制作过程类似剪贴图,根据教材内容,教师先在较厚的纸片上画好有关生物的形态结构图形,涂上颜色,剪去图形周围多余的部分,再在背面用胶水粘上小量棉花,把它贴到预先制作好的绒布上。运用贴绒教具进行教学的突出优点是:一、能随着教材内容的变化,教学进程的发展而逐步出现在学生面前,避免了在一张挂图上所有形态结构一次性出现的缺陷。具有新诱性, Intuitional teaching is one of the most important teaching principles in biology teaching in middle schools. Almost all biological courses cannot be separated from this principle. In the middle school biology teaching, there are many kinds of intuitionistic teaching methods. Here, we focus on the role of Velvet teaching aids in biology teaching. The so-called sticky velvet teaching aids are developed on the basis of visual aids such as wall charts and cut-outs. The role in teaching is far beyond the visual aids such as wall charts. The production process of the Velcro teaching aids is similar to the clip art. According to the content of the teaching materials, the teacher first draws the morphological structure of the living creature on a thick piece of paper, colors it, cuts off the excess parts around the figure, and glues it on the back with glue. Apply a small amount of cotton to the pre-made velvet. The outstanding advantages of teaching using the Velcro teaching aids are as follows: First, they can gradually appear in front of students as the content of teaching materials changes and the teaching process develops. This avoids the one-off deficiencies of all morphological structures on a wall chart. With new inducements,