1. Tap the add response button 2. Choose a drawing tool to mark where to begin on the number line, and then where the line will end based on the number operation given. Please use a green dot to begin and a red dot where it ends. See the example. 3. Tap the microphone button to record your voice explaining the number operation. Ex; "one and three is four." or "one plus three equals four." 4. Tap the green check button to save your work and submit it.