No, you weren't the only one.

The only reality-based test mentioned in this review was whether Okies could get a "basic" job in a factory, and an assertion that this would require critical thinking skills (with the implication that such skills would be of the sort taught at school).

However, I think Ripley may give more in her book. An NYT review suggests she discusses how American school-leavers "lack the knowledge and skill to compete in the global economy". It's all a bit vague, I admit.

"Teaching children to think" is a much-used phrase. It could mean a great many things.