教学内容：九年义务教育五年制小学数学第二册《厘米和米的认识》第一课时 教材分析：认识厘米和用厘米量，重要的是让学生了解长度单位──厘米的实际长度，并能够在实际中应用。教材先说明尺的用处以后，让学生看着自己的小尺子，认识１厘米、２厘米……的长度。例１是用尺量 Teaching content: Nine years of compulsory education Five years of primary school mathematics Volume II “understanding of centimeters and meters” The first lesson Teaching material analysis: Understanding centimeters and centimeters, it is important for students to understand the length unit ─ ─ centimeters of the actual length, And can be applied in practice. After the teaching material shows the usefulness of the ruler, let the students look at their small ruler and know the length of 1 centimeter, 2 centimeters. Example 1 is the use of ruler