We all know, students in math classes to establish a new concept, acquisition law, you must complete a certain number of math exercises in order to consolidate the knowledge and correct understanding of concepts, theorems, formulas, etc., and gradually form skills , skills, and continuously improve observation and comparison of thinking. Teaching resources, teachers must fully tap, select a typical moderate exercise, meticulous organization, limited to unlimited changes to enable students to increase the level of thinking.
a grasp of the rich
simple mathematics classroom practice, not necessarily the capacity, reach a certain If you exceed this Therefore, teachers must grasp the simple design of classroom exercises in the rich.
as fourth grade in the review under the book
teacher asks students to recall a first learned what the unit:
then enable all students to recite the multiples, factors, even, odd, prime, prime concepts, can be 2,3 , 5 the number divisible characteristic; Finally, to produce many types of exercises: such as to find the number of times and about to find prime numbers and prime numbers, according to the conditions of teachers to find the number of ... ... too busy for a slide one has a, what seems to have reviewed, and students go to the market as the same, but little information. B
teachers before class for students to reflect on their own review of this unit which knowledge mastered quite well, which is not good grasp of knowledge and also to compile the written material. Marking the student teacher's written order found that the problem is more concentrated: the number of writing about a number of write failure; determine whether the same time a number is divisible by 2,3,5 have difficulties, for some special prime numbers, odd, not even grasp the characteristics. Therefore, the review, the teacher asked each student to write an arbitrary digit, finished what was observed that the number of features, combined with the concepts learned in this unit to talk about.
a student, said: number and the number of written features, the teacher presents an open question: knowledge about the unit's problems? Which is odd, which is even? Which can also be divisible by 3,5, 2,5 which can also be divisible? What number can also be divisible by 2,3,5? can be divisible by 3, □ should fill in the number?
a student, said: 0,2,4,6,8 can be. a student immediately retorted: 2,UGGs,4,8 can not only fill in 0 or 6. teacher asked the reason, the camera review of the number divisible by 3 features, then present the question: learned to solve the problem.
Finally, the teacher asked students to come up with the wrong title for each set their own review of the first, and then at the same table both as a group, the topic and test each other, teachers, tour guide. the classroom from time to time debate among students, students raise their hands to ask teachers, students, each student is very active, has absolutely no sense of monotony recitation.
may wish to interpret what the teaching of two teachers: Teacher A is based on the traditional mathematics teaching, in his view, the unit is reviewed by teachers lead students to knowledge points and then look at all the scan, multi-design some exercises to enable students repeated practice, and only became a skilled students to meet the test. and this re-visit of the review class, ignoring the key and difficult, the students led by the nose by the teacher blankly, simply repeat the kinds of questions over the degree of student resistance, contrary to the principle of proportionality, learning is not optimistic. Teacher B recitation of knowledge based on the students level of understanding,UGG boots cheap, the spirit of the principle of respect for the students to the student, the first after school to teach, to seize the key and difficult levels of exercises designed, giving top priority, mobilize the enthusiasm of students, no complex and diverse problem sets, but to activate the thinking of each student, guide students to learn in self-discovery, listening to learn to understand, learn to speculation in the discussion. Therefore, I think of: classroom exercises designed to create rich in simple for students to learn self-confident stance, with a pleasant experience the experience.
Second, the pursuit of excitement in the quiet
East China Normal University Professor Cui Yun dialogue with the front-line teachers stressed that it is not conducive to learning lessons lively, very quiet class does not work, the most conducive to learning lessons a little bit say it softly to himself. And look at the current elementary school mathematics classroom, the classroom seems to be synonymous with fun. classes began, teachers create teaching situations carefully, so that the mood of students in the variety of explanations, calculations, operation, so that students thinking is still at a low ebb. math exercises to be good fun in the pursuit of quiet.
such as teaching third grade for Jiangsu book a 12, respectively, out of this pile of small sticks 1 / 2 and 1 / 3. Can you come up with this pile of small fraction of the rods? a fraction of it? a fraction of you?
such an opening exercise, the editors of the intention? the contents arranged in the third grade next book, a student at the primary stage of second contact points, from a fraction of an object One fraction of a whole, is to recognize a fraction of the development. to understand a fraction of an object is not difficult to understand a fraction of the whole is not easy. This exercise is designed to allow students to express yourself with a map or in kind, a fraction of the knowledge. Therefore, every time for students to seriously talk about how they are holding, why take, find a number for later learning how much a fraction of the buried The following hint.
a teacher that guide: ? Then fill in the form the results of operations, the completion of the same table to share your thoughts with the results. , looked focused and thinking about. AC speech,UGG shoes, students often say: Only 5 get method. But students said: Take law, but the future will find other points can also be used to represent. static to dynamic, from the individual to learn to share the experience of peers, more students in the sub-process of a deepened understanding of a fraction of the whole, the understanding of each is a few.
Third, the limited expansion of the infinite
exercises for teachers to carefully tap the value in the consolidation of the expansion, so that students do not stay in the mind of a fixed mode, but can be flexible.
If on the fourth grade for Jiangsu List a rule, and use this law to explain the phenomenon of life, to master the strategy to solve this kind of problem, feel the diversity of problem-solving strategies.
materials pole arrangement, planting trees and so on. teaching, if only to solve these exercises, then students are likely to fall into a single mode of thinking.
a teachers guide students in resolving these problems, inspired: can think of what life similar problem? equivalent to the object in the middle, saw the number of number of segments should be less than sawn 1. complete these exercises, the teacher asked students to complete the choice of the following one question:
(1) big clock tower Zhangjiagang Customs 6 clock struck 6 pm, using 10 seconds, then the ring 12 under 12, how long Qiao Wan?
(2) Wang departure from the office, from the first floor to the the third floor of the classroom lessons to the students, to go 33 steps. Wang from the first floor to the fifth floor of the library to go How many steps?
(3), Zhangjiagang City, 3 full bus driving route about 16 km,Discount UGG boots, the distance between two adjacent stations is 1 km, a total of several stations along the way?
these math problems students living close to the actual, rather attract the attention of students. feedback link, the teacher does not meet the students answers, but guide students to think: understanding of different issues, the students experienced the analysis, thinking, comparison, observation, the whole process of problem solving and master the solution of such laws on the issue spaced objects, but also learned the use of operation and other auxiliary method of drawing line graph, they movement, speech, thinking the joint development, effective in promoting the ecological self (a positive attitude, emotions, mathematical way of thinking, etc.) development.
Jerrold said: a challenging, interesting and meaningful things. ; concepts, ideas, teaching methods, educational wisdom is the teaching ... ... the spirit of the soul. how to improve the exercise value, the answer clearly is clear: we must be concerned about students for the knowledge and understanding, but also to promote the development of thinking of the students, about student life growth!
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