What’s the difference between “opportunity gaps” and “achievement gaps”?

What’s the difference between “opportunity gaps” and “achievement gaps”?

Can schools close opportunity and/or achievement gaps between students from different ethnic and racial backgrounds?

What questions did these texts raise for you in light of your own experience with students/children? What critical questions about this/these theories do these observations raise for you? Remember you can also google for critical questions of theories if you cite your source!