Learn how to factor expressions of two variables by grouping. To factor an algebraic expression means to break it up into expressions that can be multiplied together to get the original expression.

Learn how to factor polynomials by grouping. A polynomial is an expression of the form ax^n + bx^(n-1) + . . . + k, where a, b, and k are constants and the exponents are positive integers. To factor ...

Making demographic comparisons across datasets and across time requires rigor and consistency in group definitions. Without this, one risks reporting change that is not real. Since some of our ...

Activity 1 – Frog or toad? Activity 2 – Classify the animals Activity 3 – Classification keys quiz Activity 4 – Create a classification key Classification helps scientists to put living things into ...