How is a learned word coded according to the guidelines?

A learned word is coded by circling it, which emphasizes the importance of the word and distinguishes it from the rest of the text. This method draws attention to the specific word to reinforce learning and recognition. Circling is a visual cue that helps learners notice and remember the word as part of their comprehension and fluency development. This strategy can be particularly beneficial in multi-sensory approaches, as it combines visual and kinesthetic elements that cater to different learning styles.

The other options, while they might serve similar purposes in different contexts, do not align as closely with this particular guideline for coding learned words. Underlining may imply emphasis but can sometimes be overlooked in text-heavy materials. Highlighting adds visual importance but may not be as straightforward when multiple words are highlighted together. Writing in red is effective for drawing attention but can create a sense of urgency or importance that may not be appropriate for every learning context.