This document discusses variations in language and literacy development. It covers several topics:
1. Dialects - Variations within a language distinguished by phonology, syntax, meaning and use. Standard dialects are spoken by educated people while nonstandard dialects are spoken by socially depressed minorities.
2. Evidence of language bias - Biased language can insult people and create divisions. Teachers have shown negative judgments toward students' dialects which can lower expectations and achievement.
3. Differences perspective - Rather than viewing differences as deficits, this perspective sees different dialects as equally sufficient for expression. Communication styles may vary between families and cultural groups.