When the reading group is finished, these children will move to literacy centers that continue their learning. This boy is self-selecting a book from one of the many book centers in the classroom. The instructional assistant supervises the group at the centers so that Mrs. Carter can work next with her second group of children, who are just learning their letters and sounds. This school uses parallel scheduling so Mrs. Carter can have only 8 children for a 45 minute reading lesson. Parallel scheduling allows her the flexibility of this grouping and provides the children with 90 minutes of small-group and targeted reading instruction.