This is neat, and I really appreciate it!
Some thoughts:
If there's a way to dilineate between education in a title versus a topic ("Secretary of Education", "patriotic education"), might be good.
I'm finding it weirdly hard to go from "the word is here" to "this is the context in which it was said". Some thoughts:
If there's a way to always have the search term centered in the block of text, ala that speed reading program.
Less aggressive highlighting. Maybe just change the font color, instead of highlighting and spacing.
Maybe change the text color of the sentence that it's in (as well), to help me quickly find the start and end of the most-relevant sentence?