These 31 Boom cards were designed to help students understand the difference between the r-controlled vowels or, and ur. Students will read the words and decide which r-controlled vowel will complete the word. They will drag the r-controlled vowel (or and ur) to the space provided. Fun and engaging! This product will make a great digital learning center. You will need to create an account on the Boom website. ABOUT BOOM CARDS: To use Boom Cards, you must be connected to the Internet. Boom Cards play on modern browsers (Chrome, Safari, Firefox, and Edge). Apps are available for Android, iPads, iPhones, and Kindle Fires. You will get a PDF that will link you to the Boom website. You click on the link to add the Boom Cards™ to your Boom Library.