Reading Levels Welcome! You are encouraged to register with the site and login (for free). When you register, you support the site and your question history is saved.Reading difficulty can be measured according to Flesch-Kincaid grade levels; if they rate a passage at higher grade level, the more difficult the passage is to comprehend. if they rate a passage at higher grade level, the more difficult rating a passage at a higher grade level, it is that much more difficult the higher a passage's grade level, the more difficult the higher a passage's grade level, it is that much more difficult that when a passage's grade level is higher, the more difficult it is Review Answer