Periodization is a historical skill that involves

Historical thinking involves the ability to describe, analyze, evaluate, and construct models of historical periodization that historians use to categorize events into discrete blocks and to identify turning points, recognizing that the choice of specific dates favors one narrative, region or group over another narrative, region or group; therefore, changing the periodization can change a historical narrative. Moreover, the particular circumstances and contexts in which individual historians work and write shape their interpretations and models of past events.

Explanation:

c. it required that townships set aside land for public schools.