In addition to content specific academic language, there is a body of assessment-specific language that directly affects testing outcomes for students.
Students need to understand the language of assessment and be able to respond to assessment prompts to understand what the language is asking them to do.
If students do not understand the examiners expectation, they are unlikely to give correct answers.
The grade level list will enable teachers to work backwards from their own grade to teach and reinforce vocabulary introduced at the earlier grade levels. Or the alphabetical list will help teachers pick and choose words they want to teach.
This tool has particular relevance for second language learners. They need specific instruction and practice in responding to questions and prompts using this vocabulary.