Is Technology a problem?

In Hornby High School, I think some students are addicted to their phones. This is a problem because they are using their phones in class and they learning is affected. In our last science test, around 40% of the students got a low score and they were the same people that got a low score last time because they don't listen in class discussions. Every time the teacher asks them a question, they would say "I don't know" or "I'm not sure". I think students shouldn't need to open their phones in class since we have enough time given to use it at breaks.