National Council of Teachers of Mathematics
Nctm: Comparing Properties of the Mean and Median
Through the use of technology, students can investigate how the mean and median of a set of date compares when values the data changes.
Khan Academy
Khan Academy: Center and Spread Lesson
The resource from Khan Academy provides practice questions for the Praxis Core Math Test. This section reviews probability and statistics questions connected to the center and spread of data in a collection.
Math Drills
Math Drills: Statistics and Probability Worksheets
Download these free worksheets to sharpen your skills with statistics and probability. Sheets focus on collecting and organizing data, measures of central tendency (mean, median, mode, and range), and probability.