设计意图:在大班初期,当物品的数量增多或呈无规则排列时,幼儿就可能会出现漏数、跳数、重复数等现象。因此,不受物体排列形式的影响,正确、快速地运用默数、目测、接着数、按群数数等方法,是大班幼儿需要学习的数学核心经验之一。为此,我们利用幼儿园现成的建构类玩具“磁力棒”设计了本活动,通过引导幼儿根据图纸有目的地取材料并在磁性板上搭建房 Design intent: Early in the big class, when the number of items increases or irregularly arranged, toddlers may experience leaks, hops, repetitions and so on. Therefore, it is one of the mathematical core experiences that young children in kindergarten need to learn without being influenced by the arrangement form of objects and using the correct and rapid ways of using such factors as the number of silent, visual inspection, the number of followings and the number of groups. To this end, we have designed this activity using kindergarten ready-made construction toys “Magnetic Stick”, by guiding children to purposely take materials according to drawings and build houses on magnetic plates