The way math teaching is arranged in most US public schools eschews the principles of mastery learning.
Passing a class requires a D or whatever overall, and may not even require passing a final exam.
If you 'pass' Algebra I with a C, and then you move into Algebra II, what is the most likely outcome? Maybe you scrape by with a D?
And the standards for graduating high school are low and generally not based on measuring learning or capability. That's why, at least in California, the % of students who graduate high school (complete 12th grade) is much higher than the % of 11th grade students who meet state standards in Math and English Language Arts.
Passing a class requires a D or whatever overall, and may not even require passing a final exam.
If you 'pass' Algebra I with a C, and then you move into Algebra II, what is the most likely outcome? Maybe you scrape by with a D?
And the standards for graduating high school are low and generally not based on measuring learning or capability. That's why, at least in California, the % of students who graduate high school (complete 12th grade) is much higher than the % of 11th grade students who meet state standards in Math and English Language Arts.