She began Friday’s lesson with a picture of an Ophiderma bimaculata and said to the fifth graders, “You’re about to get a feel as to how a scientist works to name this insect,” whose common name happens to be treehopper ant. Students surrounded four tables, most sitting, a couple standing, two with their knees in chairs and feet sticking into the air, one seated but rolling back and forth on a large exercise ball and one with a hoodie pulled almost over his face. Yet every child in the classroom was completely engaged in the lesson and immersed in the activity introduced.