This year I’m trying the DIX ROY acronym to hopefully help my Algebra 2 students remember the difference between domain and range!

D – Domain

I – Inputs

X – X-Coordinates

R – Range

O – Outputs

Y – Y-Coordinates

Last year, my students had a TERRIBLE time remembering the difference between domain and range. This summer, at the amazing Common Core Training I received from the Oklahoma Geometry and Algebra Project (OGAP), I was introduced to an amazing resource–Shmoop. They have amazing commentary for each and every high school common core math standard! I learned about the DIXROY acronym from their commentary on F-IF.1.

I was able to re-use the domain/range notation foldable that I created last year for my Algebra 2 students. My students were VERY confused by the different notations. I haven’t yet figured out a way to introduce these notations without overwhelming my students. They recovered, eventually.

## Free Download of DIX ROY Chart

DIX ROY Chart (PDF) (1728 downloads )

DIX ROY Chart (Editable Publisher File ZIP) (1203 downloads )

## More Activities for Teaching Domain and Range

- Set and Interval Notation Dry Erase Template
- Build a Function Activity
- Domain and Range Challenge Activity
- Sketch a Graph Activity
- Inequality and Interval Notation Chart
- Key Features of Functions Work Mat
- Find the Flubs Activity – Set and Interval Notation
- Domain and Range Restrictions Foldable
- Domain and Range Foldables
- Domain and Range Graphic Organizer DIXI ROYD
- Domain and Range Foldables (DIXI ROYD)
- Algebra 2 Domain and Range Foldable
- Drawing Boxes for Domain and Range
- Domain and Range Graphic Organizer
- Interactive Domain and Range Foldable
- DIX ROY Acronym for Domain and Range
- Domain and Range Pictionary Activity
- Notation for Domain and Range Foldable