5 Ways To Make Your Cna Inservices Memorable By: Linda Leekley BS RN | - It's a fact. Continuing education is an annual requirement for nursing assistants. It's also true that ongoing education reduces turnover and enhances job satisfaction among CNAs. But, how can you know that the information you're giving your aides is "sticking?" Here are some staggering statistics about adult learners. Over a span of three days, adults retain: