Domain and Range: We defined domain and range and practiced the definitions with tables/mapping diagrams to get them familiar with the words, but the main goal was to give the domain and range of graphs. After some conversations with the Algebra 2 teacher, we decided to stick with continuous graphs and use compound inequality notation.
To help the students picture domain and range we created a foldable I have been looking forward to since I first read about it last year. Sarah wrote about it here. Here is where Sarah found the graphs.
I didn't like that the graphs took 5 pieces of paper. I have 90 Algebra students, I can not copy that much paper. I also felt like there was a lot of blank space, so I used my snipping tool and made my own version that was only 2 pages long. I still only made enough for groups to share. I numbered them so that they could tell which was the x-axis and so that they could write the domain and range on a separate paper.
Here are my materials:
- There are a couple graphs I might switch out for others that were in the original document.
- My students should be taught compound inequality notation, not just given blanks to fill in.
- Introduce infinity AFTER practicing with non-infinite graphs.
Function/Not a Function: At my school we are discussing different intervention techniques through a book study. Most recently we were focused on vocabulary strategies. I thought it was time to try out the Frayer model for vocabulary and you can see that below in our notes. I maybe should have made it larger, but I think it's OK.
To practice determining function/not a function, students did a card sort I first read about from Sarah. This is probably my second most anticipated lesson that I read about this summer. Here is her post. Here is where she got it. Here is a link to the card sort.
Function Notation: By the time we got to function notation, I felt as thought I had overused the copier, so I gave some regular notes. I still tried to color-coat though :) I used Sarah's notes (different Sarah) as a guide. We did practice on a worksheet because I had a sub that day.