Chen, C. M., & Huang, S. H. (2017). The effects of screen size and text layout on reading performance and cognitive load. Computers & Education , 114, 79–92.
Don't stop at every word you don't understand. The goal is to enjoy the story and get the main idea. Skimming and guessing meaning from context are key skills. Read for pleasure, flow, and storyline rather than stopping to analyze every word. graded readers pdf
Select the correct level using the 90% rule: if you can understand about 90% of the words without a dictionary, it's the right level. Avoid books that are too difficult, as struggling to understand every sentence kills motivation. Don't be afraid to go lower—reading slightly easier books helps focus on fluency rather than decoding words. Chen, C
Choosing a level that is too difficult slows down your reading speed and kills motivation. (2017)