| 3. | Like , color which will change on a class hour , two kind of colors compromises the tertiary color , will have another kind of color , this change , the student has not seen , will think is very novel , will be very amusing , interest will live , all will be eager to try , the new color which students began , after to assigning out the different color mixed , appears , finally student have discovered the rule , had known the red canadian yellow stain was an orange , red canada became blue purple , huang jialan became green , but the orange green purple three kind of colors called three secondary colors , the students were beginning the middle school to arrive at the knowledge , in reality drew the conclusion
如，在上《会变的颜色》一课时，把三原色中两种颜色相调和，就会出现另一种颜色，这一变化，学生没有见过，觉得很新奇，很好玩，兴趣顿生,个个跃跃欲试,学生们自己动手，调出了不同颜色混后出现的新颜色，最后学生自己发现了规律,知道了红加黄变为橙，红加蓝变为紫，黄加蓝变为绿,而橙绿紫三种色又叫三间色，学生们在动手中学到知识,在实践中得出结论。 |
