Final answer:
Kids can experience better grades and improved focus by refraining from using phones and other screens during class, as this minimizes distractions.
Step-by-step explanation:
Kids can benefit from reduced phone time by improving their ability to focus on class activities without the distraction of their phones. According to research, engaging in class without the interruption of screens can lead to significantly better grades. A key practice for achieving this is setting a firm rule for oneself to not check emails, engage in social media, or play games during class. This conscious effort helps students concentrate more effectively on the learning task at hand.