The If I knew_____ then I could ________routine is one that focuses on assumption building. The routine will elicit students to think about important quantities in a modeling situation. If I knew (how many cabins & how many people could fit in one cabin on a Ferris wheel) I could find (the total number of people who can ride the ferris wheel).
Advancing Equity and Strengthening Teaching through Elementary Mathematical ModelingEQSTEMM Modeling in the Elementary Grades