Option 1: The instructor divided the work between Sam and [another person].
* This is the most common and grammatically correct option.
* It implies that the work was split evenly between two people.
Option 2: The instructor divided the work between Sam and [a group or task].
* This is also grammatically correct, but it changes the meaning slightly.
* It implies that the work was split between Sam and something else, such as a group of students or a specific set of tasks.
Example Sentences:
* The instructor divided the work between Sam and Emily.
* The instructor divided the work between Sam and the rest of the class.
* The instructor divided the work between Sam and the research project.
Important Note: "Between" is used when referring to two people or things. If there are more than two, you would use "among."