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“把固体放进水里”下去一课的第一部分是先引领学生猜想哪些物体会沉下去,哪些物体会浮起来,通过分组实验来验证,从而使学生经历“问题——猜想——验证——结论”的探究过程。上课时,学生沉浸于分组实验验证的猜想之中。忽然,学生的一阵讨论声吸引了我。我轻声走了过去,看着那一双双迫切而又专注的眼神,实在不忍心打扰他们,便站在一旁欣赏他们的发现。学生仍在不停地说着、做着。生1:我把一个回形针放进装满水的杯子里,水不会流出来。生2:我放两个,水也没流出来,咱们猜猜看,
The first part of “Putting Solids Into the Water” The first part of a lesson is to lead students to guess which objects will sink and which ones will float and be validated by grouping experiments so that students experience “problems-guess-validation- - Conclusion ”of the inquiry process. During class, students are immersed in the guesswork of group experiments. Suddenly, a burst of discussion attracted the students. I quietly walked past, looking at both urgent and focused eyes, really do not have the heart to disturb them, they stood aside to appreciate their findings. Students are still talking and doing. Student 1: I put a paperclip into the cup filled with water, the water will not flow out. Health 2: I put two, the water did not flow out, let’s guess,