key to (something)

key to (something)

To make sure that something matches or is consistent with something else. A noun or pronoun can be used between "key" and "to." If you don't key your expectations to your students' actual abilities, you'll just end up disappointed.
See also: key

key to

v.
To make something correspond to something else: I wrote up a teaching guide and keyed it to the materials for each lesson. The worksheets were keyed to the requirements for each course.
See also: key