10 Writing Lessons for the Overhead: Transparencies That Show Models of Strong Writing with Companion Mini-Lessons by Lola M. Schaefer
While this is not specifically written for test-taking skills, it can be very helpful in the writing aspects of the state tests. Use whichever lessons highlight skills that need to be reinforced with your particular class.
24 Nonfiction Passages for Test Practice (Grades 4–5)
5 Minute Daily Practice Test Taking by Jacqueline B. Glasthal
Super Strategies for Succeeding on the Standardized Tests: Reading/Language Arts by Sara White (Grades 4–8)
8 Practice Tests for Reading and Math (Grade 4)
Comprehension Mini Lessons: Main Idea & Summarizing
by Sarah J. Glasscock and LeAnn Nickelsen (Grade 4)