4. "Assessment is the process of finding out where students are relative to key goals at a particular time. Grading is the periodic, somewhat public statement about a student's performance at designated intervals."
Assessments should be taking place frequently but not all assessments result in a recorded grade. Assessment can be obtained in many ways to check for learning. For example, you could assess your class as a whole using KahootIt. The following day, you could assess through a practice quiz that is student corrected. The 3rd assessment could be a quiz with a recorded grade.
Remember, even something as simple as questioning in class can be an assessment tool.