Answer:
John's first experience as a college student was during the 20th century. Although he did not complete college during this time, he remembers that his learning experience was primarily focused on using critical-thinking skills.
Step-by-step explanation:
For the 20th century student, teaching focused on the use of critical thinking is far more important than teaching through ready-made formulas or memorized, context-free content. Traditional content such as math or even newer is no good if it is taught without real world application and without teaching students to reason. Colleges in the 20th century focused heavily on preparing students to use critical thinking in their professional field, so we can conclude that although John did not complete college during this period, he recalls that his learning experience was primarily focused on use of critical thinking skills.