CNAs chart by recording specific patient data and observations directly into either an electronic health record (EHR) or a paper chart. This can include information like vital signs (e.g., blood pressure, temperature, heart rate), activities of daily living (ADLs), medication administration, and other care tasks performed. Charting is often done in real-time or immediately after a task is completed to ensure accuracy and compliance with healthcare protocols. It's essential to use approved medical abbreviations and maintain a factual, objective tone while charting.