• Vocabulary usage is assessed each Friday using the words students have worked with Monday-Thursday during centers.  Students need multiple exposures to words to fully understand it and apply it.  They need to learn words in context, not isolation.  Words are divided into 3 categories or tiers:  Tier 1:  Basic words that rarely require insturction  Tier 2:  Words that appear with high frequency  Tier 3:  Frequency of these words is low and often limited to specific fields of study.  Word Wisdom, the vocabulary program we use incorporates all tiers into the 10 new words explored weekly.