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【课题】数100以内的数。【教具与学具】幻灯机;火柴棒100根;大计数器;皮球(或红花,每组一个);小计数器(每人一个)。【教学步骤】1.认识计数单位“一”和“十”。教学的顺序是:①教师取10根火柴棒于幻灯机上,一根一根地数,每数一根即带领学生在计数器个位上拨一颗算珠,数到10根就将火柴棒收拢成一堆。然后问:“这(指这堆火柴棒)是几个十?”“一个十有几个一?”问后,教师将收拢的火柴棒打散让学生观察,与此同时,教师板书:10个一是一十。②教师边演示边引导学生口述:10个一(指着刚才打开的十根火柴棒)是一十(立即收拢火柴棒成一堆);一个十(指着收拢的这堆火柴棒)是十个一(又立即打散)。这样反复两次,然后带领学生边拨计数器边口
【Subject】 Number of less than 100. 【Teaching aids and learning】 Slide projector; matchstick 100; large counter; ball (or safflower, each one); small counter (one per person). Teaching Steps 1. Understand the counting unit “a” and “ten.” The order of teaching is: ① The teacher takes 10 matches sticks on the slide projector, one by one, each one a number that will lead the students to dial a calculator bead in the first digit of the counter. Into a pile. Then ask: “How many ten?” “After a couple of ten?” Asked the teacher to break up the packed match stick for students to observe. At the same time, the teachers' blackboard: 10 One is ten. ② teachers to guide the side of the demonstration while teaching Oral: 10 a (pointing to just opened the ten match stick) is ten (immediately gather the match sticks into a pile); a ten (pointing to close the stack of matches stick) is ten One (immediately broke up). This is repeated twice, then lead the students to dial the counter edge