Only half of US high schools offer calculus, but ...

[ucbalumnus]

https://www2.ed.gov/about/offices/list/ocr/docs/crdc-college-and-career-readiness-snapshot.pdf
https://www.theatlantic.com/education/archive/2016/06/where-calculus-class-isnt-an-option/485987/
https://www.deseretnews.com/article/865656105/Calculus-classes-are-disappearing-from-high-school-curriculums.html

According to the above, only half of US high schools offer calculus, and other courses like algebra 2, chemistry, and physics are absent from many US high schools.

However, the Department of Education report says:

@Department of Education

Schools and Districts Included

The CRDC has generally been collected biennially from school districts in each of the 50 states, plus the District of Columbia. The 2011–12 CRDC included all public schools and public school districts in the nation that serve students for at least 50% of the school day. The CRDC also includes long-term secure juvenile justice agencies, schools for the blind and deaf, and alternative schools. The response rate for this large national collection was 98.4% of school districts and 99.2% of schools, representing 99.6% of students in the nation.

In other words, the set of high schools includes continuation/reform schools, juvenile hall schools, etc. that may have small enrollments of low performing students, but each of which counts as much as a large general high school in the percentage of high schools offering courses like calculus or whatever.

It would have been better if the report counted percentage of students who attend high schools where the courses in question were available to them.

[ninakatarina]

You mean someone misused statistics to make a sensationalist claim? Gasp of astonishment!