Re-reading a chapter is one of the most comforting things you can do while studying and one of the least useful. Your eyes move, the words are familiar, and nothing new sticks.
The alternative is embarrassingly simple: close the book and write, from memory, everything you think the chapter said. Do it on blank paper. Then open the book and mark, in a different color, everything you missed or got wrong.
For math and physics, replace 'write' with 'do': pick one hard problem you have not seen and solve it without notes. If you can't, that is the diagnostic you needed.
Do this after every study session, not once a week. The pain of realizing you already forgot Monday's material is the mechanism.
If you find yourself reaching for a highlighter, stop. Highlighting is note-taking that pretends to be studying.