## Reflection: Coherence Key Features of Quadratic Functions - Section 3: Practice

The direct instruction portion of this lesson went very well.  The students were making good sense of the individual features of the parabola and could see how they call came together to form the graph as a whole.  The independent practice portion of the lesson was very interesting.  Students did well with the first five key features (which I anticipated more would struggle with once they were all put together).  Students actually seemed to struggle most with the intervals where the function was increasing and decreasing.  Understandably, when students answer questions about increasing and decreasing, they tend to look at where the function is "decreasing from" or in other words, the y-value.  It is difficult for students to see that we are looking for the x-interval where the function is increasing or decreasing.  This is certainly a topic we will have to continue to revisit throughout the year.

Connecting Back
Coherence: Connecting Back

# Key Features of Quadratic Functions

Lesson 16 of 21

## Big Idea: This lesson will serve as a summary of finding all key feature of a quadratic function.

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Subject(s):
Math, roots (Algebra), Algebra, quadratic formula, x-intercept, quadratic functions, Quadratic Equations, turning point, y-intercept, axis of symmetry, vertices
40 minutes

### James Bialasik

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