Step 1: Understanding the role of evaluation.
Continuous evaluation helps monitor the progress of students and identify areas that need improvement. It ensures that students are receiving adequate attention and are continuously motivated to improve their performance.
Step 2: Explanation of options.
- (A) To provide high salary to teachers: While teacher salaries are important, they are not the primary factor in improving student achievement.
- (B) To change the curriculum: Changing the curriculum is important, but it is not sufficient by itself to improve achievement levels. The quality of teaching and evaluation is equally important.
- (C) To change the teaching methods often: While changing teaching methods can help, continuous evaluation plays a more direct role in improving student performance.
- (D) To evaluate students continuously: Correct. Continuous evaluation helps assess the progress of students and ensures they remain engaged and on track to improve their achievement levels.
Step 3: Conclusion.
Therefore, continuous evaluation is the key to improving achievement levels among students.
Final Answer: To evaluate students continuously.