BlogontheTyne, that would worry me. (Perhaps I should already be worried: I have a year 8 child, so perhaps they've also done this to him
)
If you want to take on the (probably thankless and challenging) task of making sure teachers are aware of the powerful effects of their expectations, here are some more references:
(I can't find most of them on-line, sorry; but they are proper academic sources that teachers should be able to follow up, or you will be able to find though your library if you want)
Rosenthal, R., & Jacobson, L. (1968). PYGMALION IN THE CLASSROOM. New York: Holt, Rinehart & Winston. (The original 'Pygmalion' study)
Good, T. L. (1987). Two decades of research on teacher expectations: Findings and future directions. JOURNAL OF TEACHER EDUCATION, 38(4), 32-47. EJ 358 702
[[http://campoaberto.files.wordpress.com/2010/06/altasexpectativasediferenciac3a7c3a3o.pdf High Expectations and Differentiation Equal Academic Success
]]
Tauber, R. (1997). SELF-FULFILLING PROPHECY: A PRACTICAL GUIDE TO ITS USE IN EDUCATION. Westport, CT: Praeger.
Tauber, R. (1998). Good or bad, what teachers expect from students they generally get! online here
Cotton, K. (2001, January). Expectations and student outcomes.