Students engaged in collaborative conversations while arranging the "people" on the graphic organizer. Students used the sentence frames to support them while they explained the evidence they used for arranging the "people" in a hierarchy on the graphic organizer.
The word "hierarchy" is important to the context of this lesson. When and how was it introduced?
It was introduced at the beginning of the lesson. The teacher used hand movements and a familiar example (who was in charge at the school).
The words "periods and families/groups" were related to the science learning goal for the lesson. When and how were these words introduced?
The words were introduced after the investigation and after students were given many opportunities to share conversation with their partners, table groups and whole class.