Performance can be indicated using grades by evaluating a student's understanding and mastery of the material covered in a course. Grades are typically assigned based on assessments such as exams, quizzes, projects, and class participation. The higher the grade, the better the student's performance is considered to be. Grades provide a quantitative measure of a student's academic achievement and can help both students and educators track progress and identify areas for improvement. **

Grades and performance evaluation are not the same. Grades typically reflect a student's performance on specific assignments or exams, while performance evaluation encompasses a broader assessment of an individual's overall work, including their skills, attitude, and contributions. Grades are often based on specific criteria and are more focused on academic achievement, while performance evaluation can take into account a wider range of factors, such as teamwork, communication, and problem-solving abilities. Overall, grades are a subset of performance evaluation, which provides a more comprehensive view of an individual's abilities and contributions. **

Performance grades should not be abolished in schools, as they provide valuable feedback to students, parents, and teachers about a student's progress and understanding of the material. Grades can help students set goals, track their improvement, and identify areas for growth. However, it is important for schools to use a variety of assessment methods and to ensure that grades are not the sole measure of a student's abilities. Additionally, it is important for educators to provide support and resources for students who may be struggling to meet grade expectations. **

There could be several reasons why your grades may not reflect your performance. It could be due to a lack of understanding of the material, not studying effectively, or not demonstrating your knowledge and skills effectively in exams or assignments. It's also possible that the grading criteria may not align with your strengths and abilities. It's important to communicate with your teachers or professors to understand their expectations and seek feedback on how to improve your performance and grades. **

Performance evaluation in schools should not be abolished by grades, as grades provide a measure of a student's understanding and mastery of the material. However, grades should not be the sole measure of a student's performance, as they do not always accurately reflect a student's abilities or potential. Schools should consider incorporating other forms of assessment, such as project-based learning, presentations, and portfolios, to provide a more comprehensive evaluation of a student's skills and knowledge. This approach can better support students' individual learning styles and strengths, and provide a more holistic view of their academic performance. **

Grades in art and music should not be abolished. While these subjects may be more subjective in nature, grades can still provide valuable feedback to students and help them track their progress. Additionally, grades can motivate students to put in effort and take their art and music education seriously. However, it is important for educators to use a variety of assessment methods, such as portfolio reviews and performances, to accurately evaluate students' skills and understanding in these creative subjects. **

There are typically four grades for non-performance in school: Incomplete, Withdrawal, Fail, and No Credit. Each of these grades indicates different levels of non-performance or failure to meet academic requirements. These grades can have varying consequences on a student's academic record and progress. **

I'm sorry, could you please provide more context or specify the subject you are referring to so I can give you a more accurate answer? **