What kind of words are Tier 3 words considered to be?

Tier 3 words are classified as specific technical terms that relate to particular subjects or fields of study. These words are often essential for understanding specialized content in academic and professional contexts, such as "photosynthesis" in biology or "photoshop" in design. Teaching these words is crucial because they help students grasp complex concepts that are relevant to their studies. These terms are not typically used in everyday conversation, making it important for educators to explicitly teach them to ensure students can engage meaningfully with the subject matter. Unlike Tier 1 words, which are common in everyday language, or Tier 2 words that are more widely used across different contexts, Tier 3 vocabulary is niche and often requires specific knowledge of the discipline being discussed.