Khan academy doesn't work?

I use Khan academy and its like the questions I learn how to do aren’t even on the practice test, which are from the college board’s website. Is anyone else noticing this and am I just missing something? Am I really that bad at math? Does khan academy really work? Maybe I just haven’t practiced enough?

@nickerjackker Do you have any specific examples?

A good practice test should resemble the actual test (in terms of difficulty, topics tested, balance of topics, and many other factors), but don’t expect KA questions to appear on the CB practice tests or vice versa.

Yeah, in Khan there is a section all about linear equations and I have yet to even use it on any of my practice test, which are from College Board.

@nickerjackker I can guarantee you there are plenty of CB practice test questions that are about linear equations, or systems of linear equations.

Examples: Test 1, Sec. 3 Questions 6, 9, 11, 12, 18, and Sec. 4 Questions 4, 15, 16, 19