Have high school graduation rates changed over time across different groups of students?

https://nces.ed.gov/programs/digest/d14/tables/dt14_236.60.asp?current=yes
Students’ assessment scores in reading, math, and science were lowest for students in households with incomes below the federal poverty level and highest for students in households with incomes at or above 200 percent of the federal poverty level in 2010–11. http://nces.ed.gov/pubs2012/2012049.pdf
http://nces.ed.gov/surveys/pisa/pisa2012/pisa2012highlights_3a.asp
Results from the 2012 NAEP trend assessment show some progress in the narrowing of the White-Black and White-Hispanic score gaps in reading and mathematics since the 1970s. http://nces.ed.gov/nationsreportcard/studies/gaps/
In 2012–13, a total of 574,000 STEM degrees or certificates were conferred. http://nces.ed.gov/programs/digest/d14/tables/dt14_318.45.asp
https://nces.ed.gov/programs/crimeindicators/crimeindicators2013/index.asp
59 percent of first-time, full-time students who began seeking a bachelor’s degree at a 4-year institution in fall 2006 completed the degree at that institution within 6 years. https://nces.ed.gov/programs/coe/indicator_cva.asp