Detailed description:
For example, calculate the improvement rate of grades between two grades. Let the previous grade be X 1 and the next grade be X2, then the grade improvement score is X2-X 1, and the grade improvement rate divided by the first grade is ((X2-X 1) * 100%). X 1 .
For example:
Xiao Ming scored 80 points in the first math test and 88 points in the second math test, so he improved 8 points in the second math test, that is, X2-X 1=8 points, so his improvement rate is 8 * 100%/80 = 10%.
Extended data:
Through performance evaluation, we can judge the level of teaching quality, find problems and take measures to improve teaching and stimulate students' enthusiasm for learning. There are high-quality indicators to evaluate students' grades, namely reliability and validity. It is necessary to comprehensively measure the breadth, depth and proficiency of students' knowledge and skills, as well as their ability to apply knowledge to practice; Honesty and creativity in answering questions; Whether oral or written organizational expression ability and thinking process are scientific; The nature and quantity of errors, etc.
The evaluation of students' academic performance generally takes two forms: comments and grades. In addition to evaluating academic performance, comments also evaluate students' learning attitude, efforts and progress, and point out the main advantages and disadvantages of students in learning and the direction of their efforts. Scoring adopts a percentage system or a scoring system, and scoring can also be combined with comments. There are many methods and models to evaluate grades. At present, most schools take exams and tests.