Vowel-rr is a short video from Nessy that teaches students about spelling words with “rr”. One “r” will change the sound of the vowel in front of it, changing it from a short vowel sound to a long vowel sound. This only occurs with one “r” though. With two “r’s” the vowel in front, keeps its original short sound.
I like the approach that Nessy has taken, because they explain the rule with a short, memorable, visual story, with supportive, brightly colored text added below. These videos from Nessy are created with dyslexic students in mind, but are truly valuable for most, if not all people.