What was one development in education policy during the 20th and 21st centuries?

The answer is:

The federal government became increasingly involved in education.

The role of standardized testing varied over time

Schools and universities are given with the freedom to regulate their teaching methods, but the government felt that it's necessary to oversee the quality of these schools and universities. Standardized testing was made to ensure that all universities follow a certain quality standard in their programs without taking much of their freedom in teaching the students.

whats the question? im not quite understanding your question.

can we see the cartoon?