system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:What is the no child left behind act, and why did it garner so much hate towards standardized testing?

Sorry folks, not American. Just thought it was confusing.
gpt
Opponents of the law argue that funding for schools is tied to standardized test scores and schools failing to keep have their funding cut.  Rather than schools paying individual attention students, students are taught to pass the standardized tests and receive little to no educational substance because the teachers are not incentivized to do anything except teach students to pass standardized tests.

Additionally, opponents to the law say that schools with poor performance are in need of more assistance to improve, rather than less and that schools which are well-funded are less in need of additional federal financial aid.  Therefore the law does nothing but further divide the educational gap.

**Edit:** It has been pointed out that funds for schools aren't cut just because of failing scores.  It has been proposed (but not ever put into effect) in some states (Pennsylvania) that budgets are reduced year-to-year that schools do not show marked increase in test scores and performance.  Though funding isn't directly tied to it, schools that routinely fail to perform do face closure.