I. Theory and research. The lay of the land: old and new perspectives in language arts -- Moving from correction to contrast: code-switching in diverse classrooms -- Linguistic insights for the language arts classroom -- Code-switching succeeds in teaching standard English. II. Classroom practice. Diversity in language -- Teaching noun patterns: possessives -- Teaching noun patterns: plurals -- Teaching subject-verb agreement -- Teaching past time -- Teaching gonna/going to -- Code-switching with more complex patterns -- Code-switching in the reading and writing classroom -- Encountering new patterns.