Factoring and Solving Quadratics
Factoring and Solving Quadratics
A Cluster of Related Tasks
Professional Development Notes
Goals – Main Points:
• Fundamental connections among factors, solutions, and graphs (The Factor Theorem)
• What is the purpose and focus for teaching factoring?
o Factoring and the factored form are important.
o The amount of instructional time devoted to by-hand factoring techniques could be reduced.
• How does the form of an algebraic expression or equation directly connect to features of the graph of the associated function?
Cluster of Related Tasks
These tasks could be done in the order shown:
1. Solving, Graphing, and Factoring Quadratics:
Connections Among Solutions, Graphs, and Factors
o Problem-based instructional task, with accompanying PD notes
2. Quadratic Formula Analysis
o Brief task examining two forms of the quadratic formula and the connections to features of the graphs of quadratic functions
3. Mystery Quadratic
o Meaningful distributed practice, as review of the previous task
4. How Many Quadratics Factor?
o Brief task generating random quadratic expressions to see how many factor over the integers
5. Which Quadratics To Factor?
o Brief discussion task about what level of complexity of quadratic expressions should be factored by hand as part of core classroom lessons
6. Reflections on Factoring
o Brief reading about what is factoring and why do it
7. A Few Quotes from Mathematicians about Factoring
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