You expressed concern about your daughter having some difficulty with "information overload." We all can experience "information overload" if we are trying to memorize and retain information in short term memory. The goal is getting information into long-term memory so that it is there when we need to use it. The way this is accomplished is to practice new principles, generalizations at the "application level" rather than trying to memorize them as isolated facts.
The Spalding Method will teach the rules, generalizations, and principles needed for success by ensuring the student is working at the application level rather than simply at a recall level. Nothing is taught in isolation; everything is learned in the context of applied meaning and usage. I believe your daughter would benefit greatly from using The Spalding Method.