**Number & Operations:
Broken Calculator**
In Number & Operations: Broken Calculator, students develop computational fluency by
solving problems with a "broken" calculator. For example,
a baker packs 315 buns into boxes of 8. How many boxes will the
baker need? The division key is broken! Students must find ways
to solve the problem, evaluate the solutions, and explain their
reasoning.
**Participants in this course explore:**
- Ways to challenge
students to create strategies for solving problems and to evaluate
mathematical ideas.
- The importance
of having students explain mathematical reasoning to each other.
- Alternative
strategies for solving multi-digit multiplication and division
problems, from repeated addition to decomposition and compensation
strategies.
- Problem-solving
activities that help students develop strong computational skills
and number sense.
- The calculator
as a problem-posing tool.
- Questioning
strategies that foster resourceful problem solving.
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