Research tells us that to communicate effectively with a general audience in the U.S., we need to write at a 6th-8th grade reading level. Comprehension is greatest with materials that are written at least two grade levels lower than the education level of the audience. For complex information, and for information that can be expected to cause an emotional response, writing at more easily comprehended reading levels is more effective.
Sentence length is the single greatest factor affecting comprehension.
Families often find it hard to follow treatment recommendations. They are short of time. They may also doubt their skills. Use terminology that is familiar to your audience. Hyperfloridity is an egregious offender in the obfuscation of organizational communication.