Students at the frustration reading level struggle with...

The option indicating that students at the frustration reading level struggle with understanding more than 90% of words is correct because it reflects the threshold at which reading becomes difficult for students. At this level, students can generally read some words but face significant difficulties with comprehension, indicating that they cannot grasp the meaning of the text effectively. When students understand less than 90% of the words, they often become confused and frustrated, leading to a lack of engagement and further hindering their reading development.

This understanding is crucial for educators to identify the challenges these students face, allowing them to tailor instructional strategies that provide additional support and targeted intervention to improve reading skills. The other options do not accurately capture the essence of the frustration level; for instance, mispronouncing less than 80% of words speaks to decoding but does not directly address comprehension challenges. Being able to answer at least 60% of questions also does not define the reading level directly. Because reading is fundamentally about understanding the material, assessing comprehension through word understanding is a fundamental indicator of the frustration level.