How to prepare experimental materials under the large class

Our school is a typical large scale, at least 64 students in each class, compared to the surrounding schools. Students are very fond of science class. As a science teacher, they feel that science is a hard work at the same time. Because the preparation of experimental materials is too many and too difficult. The last lesson of science is only 40 minutes, but preparing for experimental materials sometimes takes 40 minutes, and the invisible workload is very huge. In this case, I also often think: how do we prepare experimental materials under the big class? In the years of practice, I have the following experience.

A temporary variable, ready for daily accumulation of

Science is a course based on inquiry, and some of the experimental materials needed are very complicated.

Such as teaching material unit on the third grade &ldquo Materials Science Edition; the ups and downs in the water ” to the ups and downs of this lesson is to experiment, wood, paper, metal, plastic and other common materials in the water, and their research. For the scientific nature of the experiment, at least 2 solid items should be prepared for each material. According to the 12 experimental teams, we need to prepare 96 solid objects for the experiment teachers. If only one day before the class is prepared, not only is the time unusually tense, but there may also be a case of incomplete preparation. To this end, teachers can not rely on temporary preparation, but in the daily accumulation of more effort. I have a cupboard, which contains a lot of &ldquo I usually collected, &rdquo, and beverage bottles, cans, straws, tiles, tiles, tiles and so on. Teachers in other disciplines joked that this cabinet is a recycling center. As far as I know, the waste recycling center has played a double role in the process of preparing the experimental materials.

Two, for the
In addition to their carefully prepared experimental material, teachers should make good use of various resources, including the resources of the school, parents and students curriculum resources, to change a person's resources for a variety of fight a lone battle. The condition of our school is pretty good. All the grades have all the scientific toolboxes matched with the textbooks. There are two experimental preparation rooms, which provide a material basis for the preparation of experimental materials. Secondly, the parents of our students are in all walks of life and can provide some convenience for the study of some content. For example, some parents work in the College of biology, which can provide specimens for plants and animals. Some parents work in the geological department, which can provide us with all kinds of rock and mineral specimens. In addition, children's enthusiasm for learning can not be ignored, they are very willing to help the teacher. As long as we can effectively instruct students how to prepare experimental materials and make timely evaluations of materials prepared by students, students are the most powerful support for teachers to prepare materials. Remember in the fourth grade 2 professor “ rape ” before this lesson, I have to worry about where to find so many rape flowers. With a try, I gave the students the task of preparing the rape flowers. What I did not think of is that many students have brought rape flowers, the result of this lesson is more than enough material, to reach a degree of human hands.

The smooth implementation of the above two points are an important foundation, is that teachers should have a comprehensive understanding and grasp of teaching materials, the need for experimental materials clearly in mind, prepare well in advance, so as to have answers and no worries, so as to ensure the scientific teaching smoothly.