These ladies are showing they know what the rhythm is by raising their hands to share their knowledge.
He's writing down what he just heard, and he has a full board of other rhythms that he heard too!
She has her time signature and her hearts ready for dictating! The time signature shows us how many beats our rhythm is going to have and the hearts show us those beats for our writing.
Being a master at showing what was clapped, he is transferring what is on his individual board to the big white board to show the class the answer!