我上二年级《茎》一课时,让学生区分树茎和草茎的不同,目的是得出木质茎和草质茎的概念。然而学生都只认为树茎粗、草茎细,一个学生说树茎硬、草茎软时(这正是我的要求),许多学生都认为这是因为草茎比树茎细造成的,‘树枝梢不是也软吗?’我只能要求学生比较时,应当把整棵树和整棵草比。 When I was in the second grade “Stems”, I asked the students to distinguish between the stems and the stems of grass, in order to derive the concept of stems and grass stems. However, most students only think that the stems are thick and the grass stems are thin. One student said that when the stems are hard and the stems are soft (which is what I request), many students think this is because the stems are thinner than the stems. Is the tree branch soft? "I can only ask students to compare the whole tree with the whole grass when comparing them.