Blog
Guides on AP exams, GPA, legal deadlines and sales commission
Mean vs Median vs Mode: What's the Difference and When to Use Each
A clear breakdown of the mean, median, and mode, how to calculate each one, and when to use which measure so outliers don't distort your numbers.
How Are Court Filing Deadlines Calculated? FRCP Rule 6 Explained
A complete breakdown of how legal deadlines are counted under Federal Rule of Civil Procedure 6 — excluding the trigger day, counting calendar days, and extending past weekends and holidays.
How Sales Commission Is Calculated: Flat vs. Tiered Rates
A clear breakdown of how flat-rate and tiered (graduated) sales commission is calculated, how draws against commission work, and the common structures real commission plans use.
What AP Score Do You Need for College Credit? (By School & Subject)
A complete guide to AP score requirements for college credit at different types of schools — Ivy League, state universities, and community colleges — plus subject-by-subject breakdowns.
How to Calculate Your GPA: Step-by-Step Guide for High School Students
Learn exactly how to calculate unweighted and weighted GPA from letter grades, how credit hours factor in, and how to figure out your cumulative GPA across semesters.
How AP Exams Are Scored: The Complete Guide to Composite Scores
Learn exactly how College Board converts your raw MCQ and FRQ points into a 1-5 AP score, and why no score calculator is ever truly "official."
Weighted vs. Unweighted GPA: What's the Difference and Which Matters?
A clear explanation of weighted and unweighted GPA, how Honors and AP classes change your GPA calculation, and which version colleges actually care about.