Article 01: The Inclusive Classroom: Teaching Mathematics and Science to English-Language Learners. It's Just Good Teaching.

1 The Inclusive Classroom: Teaching Mathematics and Science to English-Language Learners. It's Just Good Teaching.
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Jarret, D (1999).
Northwest Regional Educational Laboratory, 101 SW Main Street, Suite 500, Portland.
 
Available in ERIC as of March 21st, 2010

This is dated 1999, but is still a good read today. The context is children in the US learning Science and Maths through English as a second language, but the messages about language in these subjects are applicable to CLIL and other FL-medium contexts.