Final answer:
Students are practicing singing skills when using a karaoke machine. It helps improve their vocal technique and acoustic encoding. It also helps develop performance skills and confidence.
Step-by-step explanation:
The skill that students are practicing when using a karaoke machine is singing. Karaoke machines allow students to sing along with recorded songs and practice their vocal skills. It helps them improve their pitch, rhythm, and overall vocal technique.
Using a karaoke machine also helps students with acoustic encoding, which is the process of encoding sounds and words through song and rhythm. This is why many educational lessons for young children are done through song and rhyme.
Additionally, using a karaoke machine can also help students develop performance skills, such as stage presence and audience interaction. It gives them an opportunity to express themselves creatively and build confidence in their singing abilities.