Sight-singing is one of the essential skills for music students. It can help us better understand and express music. The following are some effective practice methods:

1. Scale practice: Start with the simple key of C major and gradually expand to other keys. Instruments such as piano or guitar can be used to assist with practice.

2. Rhythm practice: Practice rhythm through percussion instruments or metronomes. You can start with simple quarter notes and gradually increase the difficulty.

3. Melody practice: Choose a simple melody and practice it repeatedly until you can sing it accurately. You can gradually increase the difficulty and try more complex melodies.

4. Harmony practice: Learn how to combine different notes together to form a harmonious sound. You can improve your harmonic ability by listening to songs and analyzing song structures.

5. Key modulation practice: Try to sing a melody in a different key. This can help us better understand the structure and relationships of music.

6. Video tutorials: Watch professional sight-singing tutorials and learn their techniques and methods. You can choose a tutorial that suits you to study.

7. Cooperate with others: practice sight-singing with other music students, supervise and encourage each other. Group activities can be organized to complete some challenging exercises together.

8. Persistence in practice: Sight-singing requires a long period of accumulation and training, and only through unremitting practice can progress be made. Set aside a certain amount of time every day to practice and maintain your love and interest in music.