From a given array, students identify the number of columns and the number of objects within each column
A. Explore the concept of rows
B. Explore the concept of columns
D. Identify the number of rows and the objects within them
E. Compose a repeated addition sentence based on an array's rows
F. Compose a repeated addition sentence based on an array's columns
G. Represent arrays as their number of rows and objects and as repeated addition sentences
H. Describe arrays in terms of their columns and rows