Dual Language/Immersion Research, Reports and Articles

There is a considerable body of research that outlines the benefits of dual language/immersion programs for students, including:

  • higher academic performance,

  • greater cognitive development in mental flexibility, creativity, and divergent thinking,

  • high levels of proficiency in the target language and in English,

  • positive cross-cultural attitudes and behaviors, and

  • enhanced career opportunities.

Here are some recent publications that describe these benefits.

Note: All documents are hyperlinked from a Google drive. Please click on the item you would like and download a copy using the download arrow in the center.

Thomas & Collier Studies in North Carolina


Dr. Virginia Collier and Dr. Wayne Thomas,
Professors Emeritus at George Mason University,
have conducted a longitudinal study of
North Carolina's dual language/immersion programs.
Here are the results of that work in report form:

Year 1 (2007-2008)

Executive Summary (3 pages)

Full Report (46 pages)

Year 2 (2008-2009)

Executive Summary (3 pages)

Full Report (45 pages)

Year 3 (2009-2010)

Executive Summary (3 pages)

Full Report (65 pages)

In addition, "Astounding Effectiveness - The North Carolina Story" was included as Chapter 5 in Thomas & Collier's book,
Dual Language Education for a Transformed World (ISBN: 978-0-9843169-1-5).

University of North Carolina (UNC) - Charlotte Research on Dual Language/Immersion


Dr. Joan Lachance,
Assistant Professor of TESL at UNC-Charlotte,
is conducting a number of studies with educators
in dual language/immersion programs.

Below are her most recent publications. More will be posted when they are available.
A Case Study of Dual Language Program Administrators: The Teachers We Need
International Journal of Educational Leadership Preparation
Spring 2017, Volume 12, Number 1
pages 1 - 18
Case Studies of Dual Language Teachers: Observations and Viewpoints on Authentic, Native-written Materials for Biliteracy Development
Journal of Bilingual Education Research & Instruction
2017 Volume 19 (1)
pages 53-68

U.S. Department of Education: Office of English Language Acquisition

Dual Language Education Programs: Current State Policies and Practices (December 2015)
Full Report

Recommended Books & Other Research Materials

The Psycholinguistics of Bilingualism by Francois Grosjean and Ping Li

ISBN-13: 978-1444332797 (Paperback version; also available in Hardcover and Kindle)