Where can I find articles or discussion material about the
relationship between instruction and assessment in childhood literacy
education?

I am not sure if this is exactly what you are after, but I hope they may help:

http://www.project2061.org/newsinfo/earlychild/context/bowman.htm

http://www.fairtest.org/youngbib2.html

http://www.ed.asu.edu/edrev/reviews/rev139.htm

http://www.ed.gov/offices/OESE/earlyreading/publications.html

http://www.mcrel.org/resources/services/academies/scaffolding.asp

Okay thanks... real good... found something very useful in alink...