Category Archives: Algebra 1

Function Notation for Algebra

Below is a video of a lesson I recorded on function notation using the Explain Everything app. The lesson starts by addressing the concept of function notation by connecting it to the use of the notation “Dr.” as in Dr. Nick of Simpson’s fame. The lesson builds on prior knowledge throughout with a focus on color coding and multiple representations.

This videos shows an instructional approach to teaching function notation and concepts in general and video lessons can be used for students who miss class or who need differentiation.

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Function Notation

Screenshot 2017-11-24 at 8.24.37 AM

Function notation is challenging for many students yet we teachers overlook the reasons for the challenges. For example, students see the parentheses and rely on the rule they were taught previously, y(5) is “y times 5”. Because this is overlooked by teachers we often skim over the concept of notation and delve into the steps. This document┬áis a means of presenting the concept and the use of function notation in a meaningful way. Feel free to use or revise and use the document as you wish.

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– symbol: negative vs subtraction

The use of the “-” symbol is challenging for many students. They don’t understand the difference between the use of the symbol in -3 vs 5 – 3. To address this I use a real life example of multiple uses of the same symbol (1st 2 photos below) then break down the “-” symbol (photo below at bottom). I suggest this be introduced immediately prior to the introduction of negative numbers.

negative vs subtractionNegative vs Subtraction B

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Functions Introduction Video Lesson

This video provides instruction to introduce the definition of and conceptual understanding behind algebraic functions.

Functions video

Functions

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Relations Introduction Video Lesson

This video provides instruction to introduce the definition and conceptual meaning behind algebraic relations.

Relations Video

Relations

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