The first mid-term exam in grade three is coming, and I still go to bed at 9: 30 every day. "It's already half past six. You don't have to get up. You'll walk to school by yourself." Alas! It's dad's earth-shattering voice again. I got up quickly, washed my face, had breakfast, and was ready to go to school for the final sprint.
"Bang, bang, bang …" I was very nervous when the bell rang. I've always wanted to make myself less nervous, but more nervous. As soon as the teacher handed out the paper, he saw that some students were writing it, and found that some students didn't understand anything, so they began to play with rulers, pencils and wet wipes. Most students write hard. When I found the topic more and more difficult, the bell suddenly rang, so I had to hand in the paper to the teacher to prepare for the next exam.
After two days of mid-term exams, it's finally over. The next day, the teacher handed out the revised test paper, and I felt that I didn't do well in the exam, especially in science and mathematics, and I only got 80 points. After this exam, I suddenly realized that I must review my lessons every day in the future, and I must never "cram" again to avoid "failing" again.
The nervous mid-term exam was over, and when I saw the score, I lowered my head again, because I didn't get the score I promised my mother. I regret it because I was careless and didn't work hard at ordinary times.
I got 4 points for the arrangement of sentences in Chinese papers, and 1 for the mistakes in composition. This is where I blame myself the most. I usually read too little and have too little knowledge. I will strengthen my reading ability in the future.
All the questions on the math paper were deducted because of my carelessness.
In the future, I will get rid of all my problems, study hard, listen to my mother and teachers and prepare for the final exam.
Today, we had the first large-scale exam since we entered school. I'm very nervous when preparing for the exam, but I'm not so nervous when I think about what I usually review.
I am very nervous about today's exam, and I am very happy. The exam is a serious matter, so I didn't speak during the exam. I am very satisfied with the Chinese test paper. I will continue to work hard next time. There is a mistake in my math test paper. After the exam, the teacher will tell us the topic, and I will understand. I will work harder in the next math exam, so that I can answer all the questions correctly, so much the better. I think I can do all English, and I will continue to study English hard in the future. The exam is over, and I think it's ok. If my grades are not satisfactory, I will continue to work hard.
Summary of the composition of the senior high school entrance examination 4 I. Elastic spring dynamometer
Elasticity: An object will deform when stressed and return to its original state when it is not stressed. This property of an object is called elasticity.
Plasticity: an object cannot automatically recover its original shape after being stressed. This property of an object is called plasticity.
Elastic force: the force produced by elastic deformation of an object.
Spring dynamometer: principle: within the elastic limit, the greater the tension the spring receives, the greater its elongation (within the elastic limit, the elongation of the spring is directly proportional to the tension it receives).
Use of spring dynamometer: (1) Identify the dividing value and measuring range; (2) check whether the pointer points to the zero scale, and if not, set it to zero; (3) Gently pull the scale hook several times to see whether the pointer returns to zero scale after each release; (4) When measuring the force, it should be along the axis direction of the spring, and shall not exceed the scale range of the spring.
Second, gravity.
Gravity: Every two objects in the universe, from celestial bodies to dust, have gravity.
Gravity: the force exerted by the gravity of the earth on an object.
1, the magnitude of gravity is called weight, and the gravity of an object is directly proportional to its mass. G = mg.
2. Gravity direction: vertically downward (pointing to the center of the earth).
3. center of gravity (center of gravity): the earth attracts every part of the object, but for the whole object, gravity seems to act on a point, which is called the center of gravity (the center of gravity of an object with regular shape and uniform texture is in its geometric center).
Third, friction.
Friction: When two objects in contact with each other make relative motion (or tend to make relative motion), a force will be generated on the contact surface to hinder the relative motion. This force is called friction.
Friction direction: opposite to the direction of relative motion of objects.
The factors that determine friction (sliding friction) are: experimental principle: two-force balance 1, pressure (the greater the pressure, the greater the friction); 2. Roughness of the contact surface (the rougher the contact surface, the greater the friction).
Classification of friction force: 1, static friction force: there is a trend of relative motion, but no relative motion occurs. 2. Dynamic friction: (1) Sliding friction: the friction generated when an object slides on the surface of another object; (2) Rolling friction: the friction generated when a wheel-shaped or spherical object rolls. Generally, rolling friction is smaller than sliding friction.
Methods to increase friction: make the contact surface rough and increase the pressure.
Methods to reduce harmful friction: (1) make the contact surface smooth; (2) reduce the pressure; (3) Rolling instead of sliding; (4) Separate the contact surface (add lubricating oil to form an air cushion).
Fourth, leverage.
Lever: the hard bar can rotate around the fixed point under the action of force. This hard stick is called a lever.
Five elements of lever: 1, fulcrum: the point around which the lever rotates; 2. Power: the force acting on the lever to make it rotate; 3. Resistance: the force acting on the lever to hinder the rotation of the lever; 4. Arm of force: the distance from the fulcrum to the line of action of force; 5. Resistance arm: the distance from the fulcrum to the action line of resistance.
Lever balance condition: F 1l 1=F2l2.
Three levers: (1) labor-saving lever: L 1L2. At equilibrium, F 1G floats (finally floats when f floats =G).
(3)F float =G float or float
Method 2: (Compare the densities of objects and liquids)
(1) sinking; (2) floating; (3)= floating. (Non-floating)
Archimedes principle: the buoyancy of an object immersed in a liquid is equal to the gravity of the liquid it displaces.
Archimedes principle formula:
The method for calculating buoyancy is as follows:
(1) weighing method: f float =G-F, (g is the gravity of the object, and f is the reading of the spring balance when the object is immersed in liquid).
(2) Differential pressure method: F float =F up -F down.
(3) Archimedes principle:
(4) Balance method: F floating =G object (applicable to floating and suspension)
The Use of Buoyancy of verb (the abbreviation of verb)
(1) Ship: Make it hollow with materials with higher density than water, so that more water can be discharged. This is why steamboats are made.
Displacement: the "mass" of boiling water discharged when the ship is fully loaded according to the design requirements. Displacement = total mass of the ship.
(2) Submarines: change their own gravity to achieve ups and downs.
(3) Balloons and airships: filled with gas with density less than air.
(4) Densitometer: an instrument for measuring the density of liquid. The working condition is that the object floats on the liquid surface (F float =G), and the scale value is small up and big down.
In a blink of an eye, the tense and urgent mid-term exam is over. At the same time when the results are announced, my mood is also ups and downs, and the rest is summary and reflection.
Our midterm paper is from Nantong. In this exam, I got the sixth place in my class. Chinese mainly punishes reading comprehension, while mathematics is mainly wrong in carelessness. There is another problem that the teacher corrected for me. English words and sentence patterns are not completely memorized, and the test paper is also very difficult. On the one hand, I don't pay enough attention to class, on the other hand, I don't study hard and my daily review is not in place. At the same time, I can't think when I encounter problems, and I can't read and understand many words. History is my biggest lesson, and my answer sheet is wrong. If I know today, why should I know?
This math test paper is very difficult. Mathematics is a multi-functional subject, which is very logical and systematic. There should be more scientific learning methods to learn and master mathematics knowledge. If the method is right, you can "hard work pays off" and get twice the result with half the effort; If the method is wrong, it will be "thankless" and get twice the result with half the effort. Wang Nuo and I often discuss learning methods. He told me that mastering more scientific learning methods is the key to success in learning. Especially in the new learning stage, with the increase of learning subjects and the acceleration of learning rhythm, it is necessary to adjust learning methods in time to meet the learning requirements of the new stage. Otherwise, you will fall behind and fall behind.
I think, first, make good preparations before class and take the initiative in class. The classroom is a battlefield. Chinese teachers often say: "Learning is a war, and you can't fight an unprepared battle." If you have a math class the next day, you should be fully prepared on the first day. On the one hand, we should read through the relevant contents in the textbook to see what we know and what we have learned; What you don't understand is new knowledge that can only be understood through the teacher's explanation. Second, concentrate on listening, take notes in class, and enter the state in advance in class. The quality of preparation before class directly affects the effect of listening to lectures. Third, timely review, turning knowledge into skills review is an important part of the learning process. When reviewing, you should read the textbook again, remember what you learned that day, remember the process of the teacher's lecture, reproduce what you learned in class, and understand the examples the teacher said. Seriously finish homework, form skills and skills, and improve the ability to analyze and solve problems. Five. Summarize in time and organize and systematize what you have learned.
In my opinion, finding a good learning method is much better than studying like a headless fly. Because, only by finding a suitable learning method can we succeed in learning.
Two days ago, our class had a mid-term exam. Today, the test paper was handed out. I got 87 points and ranked sixth. I read the test paper carefully. In fact, I can do better in the exam, and I want to find out why.
How careless of me! What punctuation marks are missing, wrong words are written, the topic is unclear, etc.-all are low-level mistakes. There are so many mistakes, the key is that I don't do my homework carefully and my handwriting is very sloppy, which leads to my bad habit of "carelessness" in exams. Alas! If only I were not careless! First of all, I want to get rid of my careless and sloppy homework, try to get rid of my careless little tail completely, and form the good habit of doing a good job of checking later. To tell the truth, the wrong question in every exam is not that I can't do it, but that this careless little tail is in trouble.
Besides, I can't do many questions. Of course, I usually do my homework slowly and inefficiently, which leads to my neglect of rest time and extracurricular reading. So in the future, I will speed up my homework, improve my efficiency, do some homework, read some helpful extracurricular books, arrange my rest time reasonably, so that I can have more sleep and more energy in class.
In the future, I will do as written above to make myself a better young pioneer!
How time flies! Half a semester passed in a blink of an eye. In the past half semester, with the joint efforts of teachers in all subjects, our class has made progress in all aspects, but there are still some problems. Now I'm here.
First, the monthly examination quality analysis
1, fortunately, it is not the college entrance examination, otherwise it will be ugly. 2. I'm glad that only by giving them a heavy blow can they wake up. 3, heavy, there is a big gap with my brother's class, and we still need to work hard: 1-50, 2 students in the whole grade, 51-100,654 students. 20 1-300 has 7 people, 30 1-400 has 12 people, 40 1-500 has 10 people, and 50 1-600 has 4 people, 650.
1. Judging from the distribution of mid-term exam results, there are fewer top students and more students with learning difficulties in our class.
Judging from the average scores of all subjects, I don't rank high in my grade, especially in mathematics. Perhaps your own efforts are not enough and you need to reflect.
3. Some students, especially boys, are not active enough in learning difficult subjects such as mathematics and English. They are afraid of difficulties. Although a lot of work has been done, the phenomenon of partiality is still serious.
4. Some students are not correct in their learning attitude, do not make progress, and muddle along.
Some potential students don't invest enough in their studies and refuse to work hard, which leads to poor grades.
6. Some students don't study in the right way. Although they have made great efforts, the effect is not obvious.
7. Individual students can't abide by school discipline and have been criticized and educated repeatedly.
Third, reflect on my work in these two months:
I think I did my best. Almost a nanny from morning till night goes to the classroom at 6: 10 after dinner every day to urge students to read books. All the teachers are also very serious and responsible. Whenever there is a problem, they communicate with each other and do students' ideological work. I'm really sorry for such a result in the exam. These teachers devote themselves to their students from morning till night. I think the main reasons are:
1, as a class teacher, the working method is not flexible enough and the ideological guidance is not in place. Although I have tried my best, I haven't found an effective medicine suitable for my class.
Although the students in this class are usually very active, most of them are sloppy and not practical.
3. Students' learning requirements are not detailed enough, such as unclear and unspecific learning objectives, poor study habits and poor execution.
Four, the improvement scheme of the later work is:
1, strengthen communication with all teachers, try to reduce the phenomenon of partiality, especially to learn well.
2. We should make more efforts in students' ideological education, effectively change students' learning attitude and change "asking me to learn" into "asking me to learn".
3. Continue to strengthen ideological education, change the learning attitude of individual students, and educate students to enjoy learning and study hard.
4. Investigate diligently and seriously, contact parents, and do a good job in educating students with learning difficulties and naughty students.
Faced with this situation, I am worried, but I will never lose heart. I must learn from excellent classes, try to narrow the gap with them, and try to send this graduating class well.