What are the three tiers of vocabulary?

The three tiers of vocabulary are essential for understanding how words function across different contexts and levels of complexity. The first tier, Tier 1, includes basic words that are commonly used in everyday conversation. These words are fundamental and typically do not require explicit instruction because they are acquired through natural exposure.

Tier 2 encompasses high-frequency, general academic words that are seen across various subject areas. These words enhance a student's vocabulary and are important for academic success; they often require direct instruction and opportunities for practice to be fully understood and used effectively.

Tier 3 consists of domain-specific vocabulary that is relevant to particular subjects or fields. These words are not frequently encountered outside specific contexts, such as scientific or technical terms, and often require explicit teaching to help students grasp their meanings and usages.

Understanding this tiered approach helps educators tailor vocabulary instruction to meet students' needs, ensuring a well-rounded vocabulary development that supports reading comprehension and communication skills.