Final answer:
One effective technique to facilitate lip closure in a school-age child with Down syndrome is to use oral motor exercises.
Step-by-step explanation:
When a school-age child with Down syndrome has poor lip closure resulting in drooling and spillage of food when eating, there are techniques that can facilitate lip closure. One of the most effective techniques is to use oral motor exercises. These exercises can help strengthen the muscles around the lips, improving lip closure and control. Examples of oral motor exercises include blowing bubbles, sucking through a straw, and using a lip press or exerciser.