Adult English Proficiency Assessments - Best Plus | Best Literacy


The Center for Applied Linguistics (CAL) provides adult English language practioners (teachers, program administrators, state directors, test administrators, businesses, and volunteers) with resources covering a wide range of topics, including second language acquisition, literacy, workplace ESL, citizenship and civics, and cultural orientation.

Our available resources include both free downloadable materials and publications and products for sale. We also offer adult ESL services in the following areas:

  • professional development

  • technical assistance

  • language assessment

  • curriculum design

  • instructional methods

Browse CAL’s collection of free online digests including:

Effects of Instructional Hours and Intensity of Instruction on NRS Level Gain in Listening and Speaking   

This digest reports on a study examining the relationship between the number of ESL instructional hours and intensity of ESL instruction with the progress of adult English language learners in listening and speaking in English, as measured by the oral proficiency assessment BEST Plus.

CAL has been a leader for decades in providing evidence-based resources for practitioners working with adult English language learners. Resources include those from the National Clearinghouse for Literacy Education (NCLE) established in 1989 to the resources and training provided through the Center for Adult English Language Acquisition (CAELA) and, most recently, the CAELA Network. Current briefs include

Browse our websites

We invite you to browse our various websites for more information or contact us with any questions you may have.

Visit the CAL website and browse our collection of publications, digests, and databases.

Adult ESL logo

Visit our CAL Solutions: Adult ESL Education website for resources for practitioners working with adult English language learners.

Visit the Cultural Orientation Resource Center website for resources for service providers working with refugee populations and information about refugee populations.