day 14: subtracting from inside the original quantity

day 14: subtracting from inside the original quantity

Understanding and Reading Problems: Once they’ve all engaged with the problem in relevant and authentic ways, Mia can then challenge pairs to defend their thinking and uncover student misconceptions.  She knows that students are likely not yet to understand that in a subtraction problem, there is a quantity being removed from another.  She asks her students, “Where are the ones coming from?” and follows their responses.

CONSIDER:
How might you have students act out problem scenarios?

These videos are discussed in the Inside Mathematics guide "Making Sense of Learning, Mia Buljan, 2nd grade," one of 10 practice-focused guides on building classroom climates for mathematical learning.

The videos document key mathematical practices observed in teacher Mia Buljan's 2nd grade classroom over the course of a school year. In the guide (available as a PDF or an iBook download), you can explore extended narratives and questions for reflection around "making sense of learning."

more videos for:

making sense of learning

video thumb

Day 2: Recognizing developmental trends [Understanding and Reading Problems]

video thumb

Day 2: Exploring and Explaining [Finding Evidence and Justifying Strategies]

video thumb

Day 2: Coming to know students as mathematicians [Understanding and Reading Problems]

video thumb

Day 3: Testing and proving different ideas [Finding Evidence and Justifying Strategies]

video thumb

Day 14: Subtracting from INSIDE the original quantity [Understanding and Reading Problems]

video thumb

Day 14: Playacting problems with different quantities [Understanding and Reading Problems]

video thumb

Day 14: Anticipating student misconceptions [Understanding and Reading Problems]

video thumb

Day 110: Recognizing problem structure [Understanding and Reading Problems]

video thumb

Day 110: Defending answers [Explaining Thinking]

video thumb

Day 158: Appreciating multiple approaches [Making Sense of One’s Own Learning]