Adults with intellectual / developmental disabilities benefit from regular repetition to learn new literacy skills. These learners also can retain skills better if these skills are reinforced frequently.
Here are some techniques to keep in mind when tutoring:
Spiral Technique: Using the spiral technique, the tutor works with the learner on a topic in an introductory way. Later, the same topic is taught in greater depth. If taught in stages, with complexity increasing gradually, learners will be less intimidated.
Computer Technique: Educational computer software easily allows learners to repeat lessons and activities until they are mastered. Using computers can encourage learners to repeat lessons, where otherwise they may become bored.
Warm-Up Technique: At the beginning of each lesson, the tutor reviews something that the learner has previously mastered. This will build the learner's confidence and momentum prior to working on something related or new.