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The difference is two units and six topics, roughly a third of the BC exam. Here is the full delta from the official course descriptions, what stays identical, and the AB subscore fact most students choosing between them have never heard of.
A returned math test is the most precisely targeted study material you own. The 20-minute redo protocol: rate your confidence before you look, find the exact line that failed, name the mistake, redo it from scratch, then explain the correct reasoning.
A former math teacher's answer for parents: the three ways kids actually use solver apps, the house rules that survive contact with a real teenager, and the one pattern that means it is time to email the teacher.
Both methods solve every linear system, so neither is easier in general. The coefficients decide: a variable with coefficient 1 means substitution, standard form means elimination. A ten-second check, with the same system solved both ways.
I sorted all 18 free-response questions from the 2024, 2025 and 2026 released exams. Four types appear in all three years. The stories change; the tasks do not.
The most valuable things in a three-day plan are the two nights in the middle of it. A day-by-day plan built on what the spacing and sleep research actually found.
Successful and unsuccessful students open the worked solution about equally often. What separates them is how they read it, and that has been measured.
Differentiation is a procedure. Integration is a search. One test settles most substitution questions, and LIATE fails in a way no mnemonic can warn you about.
The math section is 45 questions in 50 minutes, not 60 in 60. That is 67 seconds each, four of your questions do not count, and the items get harder as you go.