I have designed this set of five posters for the tricky Bossy R family where r makes the vowel/s in front of it say 'er'.
In my intervention sessions I often address this skill, particularly in spelling. These posters should make it easier for my students to remember. You could also add them to a Literacy Centre when you are consolidating this skill. If you aren't covering all the combinations with Bossy R, just leave those posters out. I use all of these because my students are usually older and confusing two or more.
I have developed games to help students consolidate the skill and these are available in a bundle as a separate package. I have also bundled these posters with the games if you are wanting a more comprehensive product at a good price.