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http://www.ericdigests.org/2003-3/spanish.htm
This digest describes some of the issues involved in the Spanish language learning experiences of heritage Spanish speakers, the largest population of heritage language speakers in the United States. It describes ways in which educators can facilitate these students' language development through a better understanding of their language learning strategies and suggests areas in which further research is needed.

http://www.ericdigests.org/2003-1/spanish.htm
The purpose of this digest is twofold--to raise awareness of the range of SNS materials available to teachers and school districts, and to emphasize the importance of articulated SNS programs with well-sequenced materials.

http://www.ericdigests.org/pre-9221/spanish.htm
This Digest addresses policymakers, administrators, and teachers of Spanish-speaking students. It is based largely on a study by sociologist Calvin Veltman (1988), The Future of the Spanish Language in the United States. The Digest examines the Spanish-speaking group in the United States, its growth through net immigration and natural increase, and its eventual decline as speakers shift to English.