The Knowledge Gap
Keenya Bemis
March 13, 2022
Keenya Oliver Bemis, a longtime CDHS stalwart, teaches high school biology in Schenectady. Her talk was based on Natalie Wexler’s book, The Knowledge Gap – The Hidden Cause of America’s Broken Education System – And How to Fix It.
The main idea is that kids don’t know nothin’. For a long time it was thought that education shouldn’t be about stuffing them with facts, but rather instilling thinking and comprehension skills. So we get reading lessons presenting some text and asking students to identify its main idea. The problem is that understanding written verbiage requires a certain amount of foundational background knowledge. And that’s something a lot of kids today woefully lack.
Bemis illustrated this by presenting some verbiage about baseball that most Americans would grasp, but not Brits. In contrast, a passage about cricket would baffle most Americans.
She invoked the “Matthew Effect” named for the Biblical snippet saying “the rich get richer and the poor get poorer.” In education, this means that kids coming in with a good stock of basic knowledge find it easier to absorb further knowledge; whereas those starting out behind fall further behind.
Another concept here is “chunking,” which refers to seeing information in a meaningful context, so as to put less strain on working memory, thus again freeing up brain resources to absorb additional knowledge. But “chunking” requires some knowledge in the first place.
In all these regards, it’s disadvantaged kids whose disadvantage is compounded. They tend to get a lot less basic knowledge in the home environment than do more affluent brats; they rely more on school to get it. But (in addition to all the many ways schools don’t serve disadvantaged kids well) they don’t get it in school either, with prevailing educational theories again focusing on trying to develop broad skills like critical thinking and comprehension rather than factual knowledge. Indeed, pedagogy in subjects like social studies and science is being cut back in favor of more reading instruction. Which is nevertheless failing – because the kids lack necessary foundational knowledge.
Bemis repeatedly expressed shock and dismay at what basic stuff her own high schoolers don’t know. Like geography – understanding a map. Is Australia a “city?” How to use a ruler. How to round numbers and use decimals. What an atom is. What the heart does. What gas we breathe.
She posited that kids actually do better, and engage more, with content-rich lessons, as opposed to abstraction-filled ones of the “what is the main idea” sort. And writing is a useful tool, forcing the recollection of information, to help retain knowledge and build long term memory.