April is invention month. "We're going to  make our own inventions," says Ms. Rooney, "and  work together in  groups." Though Emily Arrow knows it's important for each  group to think, listen, and share, she still wishes  she were the leader of her invention group. Linda  Lorca, the bossy leader, can't get anyone to  cooperate. "Snaggle doodles," Emily says. If  the group doesn't come up with an idea soon,  they'll be the worst group in the  class. Meanwhile, Emily is also busy thinking of a  wedding present for Ms. Vincent, the student teacher.  The wedding is only a few days away. Emily has a lot  to do. Can she and her group learn to work  together in time?