"OR"

The /r/ sound is altered by what vowel it occurs next to and frequently children (or adults) will only make errors on some of the /r/ sounds.  A few years ago I worked with a young man whose only errors were on the "or" sound.  I compiled this list of words for him to practice.  If you are working with a 3rd or 4th grader I would not use some of the words that they don't know the meaning of like "corridor" and "guarantor".  Just like the other word lists I've provided, I would start at the word level and as they master the sounds at word level (80% acc or better) I would advance them to phrase level, sentence level, and finally conversation. 

Initial

Organ
Orbit
Orange
Orchids
Ornate
Orca
Orange juice
Oregon
Organized
Origin
Ornament
Oriole
Organic
Orthodontist
Origami

Medial
Bored
Horn
Morning
Tornado
Storm
Recorder
Shorts
Corn
Snore
Tortilla
Sport
Story
Acorn
Sword
Porcupine
Acorn
Carport
Enormous
Resort
Horse
Tornado
Hornet
Adorable
Fourth
Storm
Skateboard
Unicorn
Warm
Corner
George

Final
Door
Shore
Bore
Tore
Pour
Boar
Oar
Seashore
Core
Four
More
Roar
Sore
War
Chore
Store
Score
Snore
Swore
Floor
Dinosaur
Matador
Theodore
Fillmore
Your
Before
Explore
Outdoor
Downpour
Wore
Soar
Trapdoor
Thor
Labrador
Condor
Abhor
Implore
Indoor
Corridor
Guarantor