We just love the Over strategy! In this episode Pam and Kim go through a Problem String to develop the relationships used to think about the Over strategy for subtraction.
Talking Points:

• Over strategy is a great experience for people new to thinking Real Math.
• The Over strategy is one of the major relationships that students need to own.
• A Problem String to nudge the Over strategy.
• The Over strategy can be tricky, so students need lots of experience and contexts.
• Modeling student's thinking on a number line helps make thinking visiable as they grapple with the relationships.
• Teacher moves to modeling that can help support students' thinking.
• Where does over subtraction fit in the hierarchy?
• Bonus! The Over strategy "uses" place value (not just place labeling)!

Download free examples of the Over Strategy: mathisfigureoutable.com/over   
Download the free ebook of major strategies: mathisFigureOutAble.com/big