Which tier of words is characterized by high frequency and often appears in different contexts?

The correct answer is Tier II. This tier of words is often characterized by a high frequency of use across various contexts and a rich semantic range, making them essential for effective communication and comprehension in diverse subjects. These words are typically encountered in both spoken and written language and are found commonly in educational settings.

Tier II words are crucial for students as they help bridge the gap between everyday language and more specialized vocabulary. Such words include terms like "analyze," "predict," and "contribute," which are not just limited to one subject but can be applied in multiple areas, enhancing students' ability to understand and interact with content across the curriculum.

In contrast, Tier I words generally refer to basic vocabulary that most children learn in their early years, such as "cat," "go," and "happy." Tier III words are more specialized and are typically used in specific subjects, like "photosynthesis" in science or "rivulet" in literature, and have a low frequency outside of those contexts. Academic vocabulary encompasses specialized terms used predominantly in educational settings, often corresponding to Tier III, rather than the broader, high-frequency nature of Tier II vocabulary.