The Resources by Chapter ancillary is provided to each teacher as part of their resource package. The high school ancillary is a valuable addition to the teaching materials and contains Family Communication Letters, Start Thinking, Warm Up, Cumulative Review Warm Up, Practice, Enrichment and Extension, Puzzle Time, and Cumulative Review worksheets.   The middle school ancillary includes Family and Community Involvement, Start Thinking! and Warm Up, Extra Practice, Enrichment and Extension, Puzzle Time, Technology Connection, and Project worksheets. The Resources by Chapter is available in print and can also be found in the online teacher Course Resources.