I was a grade schooler at the time, but if I could, I would have put her  in time-out so the rest of us could join in the conversation.
But behavior like this isn’t just rude at Thanksgiving. It’s always rude. And it’s also always rude in the classroom.
If there are students in your classroom who talk when they’re supposed to be listening or working, academic progress will suffer. Talking without permission wastes time, interrupts the learning of others, and leads to more serious disruptive behavior.
Allowing students to freely talk without permission is like driving an old jalopy; progress only comes in fits and starts, and you’ll never reach top speed.
Besides being a classroom management nightmare and slamming the brakes on learning, talking without permission is remarkably rude. It’s akin to cutting in front of the line at a sold-out movie.
 
After all, the teacher is in charge, not the students.
The most effective way to handle talking is to enforce a consequence. If hand-raising isn’t a classroom rule, I recommend including it.
and my students will love me for it because it reassures them that they are equal members of my classroom, free to join in the learning process.
It also provides a model for how to behave when working together in groups without a teacher present.
It’s important that my students understand why hand-raising is important. So be direct. Tell them that calling out and side-talking is rude and disrespectful to the class, and that it is my job to protect their right to learn without interference.
Teach my students how to take turns talking and include hand-raising as part of my classroom management plan. And if you want my classroom to run like a finely tuned Italian sports car, then enforce a consequence every time a student breaks a rule.
