Teaching to the test

We have since moved into understanding testing and the methods that are used for conducting assessment in our Social Foundations course. The concepts of standardized testing have been made apparent within these lectures. How is not possible to teach to such a test?

The testing that is laid out currently relates to the curriculum and how the "collective" students of a school are achieving. Does this mean that Grades Three, Six and Nine are somewhat white-washed in what needs to be covered? Standardized tests are their to measure the achievements of the students based on the curriculum expectations, so how can a teacher NOT be teaching to the test.