Understand the relationship between numbers and quantities; connect counting to cardinality.
To help students understand what it means to count zero of something, we can ask how many questions with containers. For example, how many eggs are in the carton, or how many cups are on the table. Students will also learn to write the numeral zero. A lesson is given by JoAnn.
Source: Page 10 of Go Math
TODO: Find or create online exercises.