安全、简单、明显低年级的实验材料首先要满足安全、简单、明显等条件,再根据教学的实际需要来准备。安全。对于低年级的学生来说,手脑配合的机能不完善以及手部的肌肉发育不完全,会使得他们在操作仪器设备的时候有些力不从心。所以,安全是必须优先考虑的因素。例如用铁质汤勺在蜡烛上加热的实验,汤勺可以换成更大、更利于抓握并且无需其他材料协助隔热的实验材料,比如木柄的花铲。 Safe, simple, obviously low grade experimental materials must first meet the safety, simple, obvious and other conditions, and then according to the actual needs of teaching to prepare. Safety. For students in lower grades, imperfections in the coordination of the hands and hands and incomplete muscle development in the hands can make them less able to operate the equipment. So, safety must be a priority. For example, using an iron spoon to heat a candle, the spoon can be replaced by a larger, more grip-proof material that does not require additional materials to help insulate it, such as a wooden shovel.