1, it is necessary to clarify the evaluation objectives, key points and difficulties.
Carefully examine the questions, prepare lessons carefully, and sort out the ideas of class: make clear the evaluation objectives and grasp the important and difficult points.
For example, questions with high error rate and low score rate and corresponding knowledge points; Typical, targeted and comprehensive topics; In the past teaching, I have contacted and corrected many times, but the students still have not grasped the difficulties; Key knowledge and skills related to follow-up study; Teaching blind spots neglected in peacetime teaching.
2. Design teaching content should be combined with students' reality.
Teaching objectives determine teaching content, and the content design of teaching evaluation is of great significance to realize teaching objectives. Different from the new teaching or review class, there is no ready-made written material as the basis for class evaluation, which is the concrete embodiment of teachers' creative work. This creativity is not invented out of thin air, but determined by the teacher's comprehensive investigation and analysis of exercises, homework and test papers, so the arrangement of teaching content should be fully in place.
3. Pay attention to cultivating students' problem-solving methods or skills.
Give students some guidance on how to study problems in lectures, and it is best to form a sequence. How to analyze, how to answer, what problem-solving strategies to choose can be considered from different angles, and what should be paid attention to in solving such problems in the future. The explanation should be targeted and effective, find out the joint points where students made mistakes in answering questions, make in-depth analysis, and explain the mistakes to prevent similar mistakes from happening again. This requires teachers to know more about students' thoughts on right and wrong questions before preparing lessons, and to ask students why they make mistakes on this question (this kind of question). Find out the problems existing in students' understanding of concepts and laws, and the defects existing in their ways of thinking and methods, so that comments will hit the point. Examination paper comment is not to modify the answer. Students should be inspired by the lecture and master some problem-solving methods so that they can use these methods to solve similar problems in the future.
4. Choose a good evaluation method and combine it with teaching practice.
We should give full play to the leading role of teachers and the main role of students, and embody the inspiring principle. Teachers exert influence on students through explanation, but students are the main body of learning, and they are not passively influenced by teachers. This requires fully stimulating students' interest in learning in history teaching, guiding students to find problems themselves, finding out the causes of mistakes, formulating measures to correct mistakes, and resolutely opposing all practices arranged or instilled by teachers.
At the same time, we should pay attention to the choice of evaluation methods and embody the principle of teaching students in accordance with their aptitude. Teachers can choose according to the difficulty of test papers, exercises and homework; It can also be selected according to teaching needs. It aims to improve the overall efficiency of classroom teaching.
5. Pay attention to guide students to analyze and grasp the proposition intention, and make clear the learning goals that should be achieved.
Proposition intention mainly refers to students' mastery of the knowledge, information and theoretical requirements provided by the syllabus and textbooks.
Second, the evaluation materials and multiple-choice questions of the square root of eighth grade mathematics in Hebei Education Edition (this big question is 10 small question, with 3 points for each small question, with a total of 30 points. Please fill in the only correct answer in the table below) 1. The following curves cannot show that y is a function of x: 2. In the following functions, the range of the independent variable x is x≥2: A.y= B.y= C.y= D.y= 3. Regarding the function y=x, the following conclusions are correct: A. The function image must pass through the point (1, 2) B. The function image passes through the second and fourth quadrants, and the following statement is correct: A. The specific message volume can be directly seen from the figure. B. the total consumption amount can be seen directly from the figure. C the percentage of each consumption amount to the total consumption amount can be directly seen from the figure. D. the specific change of each consumption amount in a week can be directly seen from the figure. 5. For a sample with 50 data, the frequency of falling in a certain group is 0.3, so among the 50 data, the frequency of data in this group is: a.50b.30c.15d.36. In the sector statistical chart, the ratio of each sector area is 5:4:3:2: 1. The center of the largest sector is a.150b.65438. If △ ABC △ is: a, then the length of BD+AD is: a.14cmb.12cmc.10cm d./kloc-0. The following conclusions about the linear function y=-2x+ 1: ①y decreases with the increase of x. 1). ④ The image passes through the first, second and fourth quadrants. Among them, the correct ones are: A.4 B.3 C.2 D. 1 10. As shown in the figure, △ABE and △ADC are △ABC folded along AB and AC edges 180, respectively. The degree of ∠ is: a.80b.100c.60d.452. Fill in the blanks (3 points for each small question, 30 points in total) 1 1. In △ ABC △, it is known. The perimeter of the new square obtained by subtracting the side length from xcm is ycm, so the relationship between y and x is that the range of independent variables is. 13. If the coordinate of the intersection of the straight line y=-x+a and the straight line y=x+b is (m, 8), then a+b=. 14. It is known that the straight line y = x. Then the solution set of inequality x-2≥-x is. 15. As shown in the figure, the results of a math test in a class are statistically analyzed, and the frequency line chart is obtained. The excellent rate of this test (above 80 points is excellent) is. 16. The maximum number of a set of data is 80, and the minimum number is 50. If the interval between groups is 5, then this set of data should be divided into two groups. 17. A middle school conducted a sampling survey on the causes of students' lack of sleep, and made the survey results into a fan-shaped statistical chart (pictured). As can be seen from the information in the picture, the number of people who think that "the main reason for students' lack of sleep is too much homework" is famous. 18. The picture shows the distribution of gold medals in the 2006 Doha Asian Games. It is known that Japan won 50 gold medals, and the number of gold medals won by China is estimated to be. 19. As shown in the figure, in △ABC, AD=DE, AB=BE, ∠ CED = 70, then ∠A=. 20. As shown in the figure, in △ABC, ∞ If the circumference of △DBE is 16cm, the length of AB side is. 3. Solve the problem (there are 7 small questions in this big question, out of 60 points) 2 1. (6 points *2= 12 points) (1) Know the image passing point of a linear function (-4). If -6≤y≤0, find the range of x.22. (8 points) As shown in the figure, l 1 represents the relationship between sales revenue of Shenfeng Motorcycle Factory and motorcycle sales; L2 represents the relationship between daily sales cost and sales volume of motorcycle factory. (1) Write the functional relationship between sales revenue and sales volume; (2) Write the functional relationship between sales cost and sales volume; (3) When the number of vehicles sold in a day is what, the sales revenue is equal to the sales cost? (4) When the number of vehicles sold in one day exceeds, the factory can make a profit (profit = revenue-cost)? 23.(8 points) The physical education committee of a middle school counted the times of skipping rope for 60 seconds, and listed the following frequency distribution table: times x 60 ≤ x 80 ≤ x100 ≤ x120 ≤ x140 ≤ x160 ≤ x/kloc. What is the number of groups? (3) If the number of skipping rope X reaches 100, what is the passing rate of this class? (4) Draw an appropriate statistical chart to represent the above information. 24.(8 points) As shown in the figure, OC is the bisector of ∠AOB, P is a point on OC, PD⊥OA is in D,PE⊥OB passes through OA in E and OB, and F is another point on OC, connecting of and EF. Verification: DF = The research study group in Macey's class conducted a questionnaire survey on readers of an evening newspaper in the city during the holiday to find out how much readers like the fourth edition of the newspaper. They surveyed 500 male and 500 female readers, asked each reader to choose a page they liked, and drew the following unfinished statistical chart with the obtained data. (1) Please complete the chart; (2) Count the total number of male and female readers who like each page, and draw broken-line statistical charts respectively. 26.(8 points) As shown in the figure, A and B are located at the two ends of a pond respectively. Xiaoming wants to measure the distance between A and B with a rope, but the rope is not long enough. Please use the knowledge of triangle congruence to help Xiao Ming design a scheme, measure the distance between A and B, and explain the reasons. 27.(8 points) The functional relationship between the daily profit y (Yuan) of an amusement park and the number of tickets sold (Zhang) is shown in the figure. (1) When 0≤x≤200 and x is an integer, the resolution function of y about x is. When 200(2) makes the daily profit of amusement parks exceed 65438+. (3) Please consider and explain the practical significance of the intersection point (0,-1000) between the image and the Y axis. (4) Please provide two more pieces of information according to the picture. 2007-2008 school year last semester eighth grade mathematics reference answer.