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This might be an outlier review, I am an 18yr old college student trying to study for the College math CLEP test, which would exempt me from a couple math classes in school. As a kid, I hated math, I was brought to tears every time I thought about it, I never understood it or had a single positive experience with it. To the point where I thought something was wrong with me. As a little girl, this really took a toll on me. Fast forward some years later, i'm taking on the task of studying math on my own this summer to take a CLEP test that would exempt me from taking 2 math classes in school. Knowing how much I had to learn in front of me, I decided to do Khan Academy.
For the first time in my entire life, math doesn't suck. Sal's careful explanations help me understand concepts that I haven't understood for multiple years. I went into Khan Academy skeptical, because like many of the kids writing reviews, I took 'Khan Academy Kids' as a youngster and thought it was very boring. Compared to any other learning program for higher level college math, it's a breath of fresh air. No 30 min videos that are depressing just to watch, no boring questions you'll never use in life. I mean who wouldn't want to watch Sal teach a math problem using 5 different colors and whatever obscure object he comes up with to represent the value of x?
With Khan academy, I'm actually learning, I'm actually happy, I have hope to pass my exams, and most importantly, Sal is reshaping my impression of math from an instant reminder of childhood frustration and sadness, to something that I even catch myself having fun with. I never thought it was possible. If you or your kid is like me and just never 'gets it' when it comes to math (especially algebra), please consider Khan Academy.
Tip for consumers:
At least just try it!
Products used:
Algebra and Functions:
Solving equations, linear inequalities, and systems of linear equations by analytic and graphical methods
Interpretation, representation, and evaluation of functions: numerical, graphical, symbolic, and descriptive methods
Graphs of functions: translations, horizontal and vertical reflections, and symmetry about the x-axis, the y-axis, and the origin
Linear and exponential growth
Applications
Counting and Probability:
Counting problems: the multiplication rule, combinations, and permutations
Probability: union, intersection, independent events, mutually exclusive events, complementary events, conditional probabilities, and expected value
Applications
Data Analysis and Statistics:
Data interpretation and representation: tables, bar graphs, line graphs, circle graphs, pie charts, scatterplots, and histograms
Numerical summaries of data: mean (average), median, mode, and range
Standard deviation and normal distribution (conceptual questions only)
Applications
Financial Mathematics:
Percents, percent change, markups, discounts, taxes, profit, and loss
Interest: simple, compound, continuous interest, effective interest rate, effective annual yield or annual percentage rate (APR)
Present value and future value
Applications
Geometry:
Properties of triangles and quadrilaterals: perimeter, area, similarity, and the Pythagorean theorem
Parallel and perpendicular lines
Properties of circles: circumference, area, central angles, inscribed angles, and sectors
Applications
Logic and Sets (15%)
Logical operations and statements: conditional statements, conjunctions, disjunctions, negations, hypotheses, logical conclusions, converses, inverses, counterexamples, contrapositives, and logical equivalence
Set relationships, subsets, disjoint sets, equality of sets, and Venn diagrams
Operations on sets: union, intersection, and complement
Applications
Numbers:
Properties of numbers and their operations: integers and rational, irrational, and real numbers (including recognizing rational and irrational numbers)
Elementary number theory: factors and divisibility, primes and composites, odd and even integers, and the fundamental theorem of arithmetic
Measurement: unit conversion, scientific notation, and numerical precision
Absolute value
Applications
Annika B.'s review of Khan Academy earned 3 Very Helpful votes
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