This is super scientific so you should totally buy our curriculum — More than 5/4th of American children don’t know what cosine is by the end of 4th grade! The National Institutes of Health has demonstrated that this unacceptable rate of failure disproportionately harms underprivileged, marginalized, at-risk, impoverished, urban, emerging, exotic, savage, heathen, Canaanite, and probably magical students. The Confederate Establishment of…