Khan Academy

Simulation showing bias in sample variance (K-A)

Statistics intro: Mean, median, and mode | Data and statistics | 6th grade | (K-A)

Statistics: Alternate variance formulas (K-A)

Statistics: Sample variance | Descriptive statistics (K-A)

Statistics: Standard deviation | Descriptive statistics (K-A)

Statistics: The average | Descriptive statistics (K-A)

Statistics: Variance of a population (K-A)

Variance of a population | Descriptive statistics (K-A)

3-D Path Counting Brain Teaser

Alien Abduction Brain Teaser

Blue Forehead Room Brain Teaser

Blue Forehead Room Solution

Forehead Numbers Brain Teaser

Liar Truth-teller Brain Teaser

Light Bulb Switching Brain Teaser

Toggler Brain Teaser

Bar graphs review (K-A)

Creating a bar graph (K-A)

Identifying individuals, variables and categorical variables in a data set (K-A)

Picture graphs (pictographs) review (K-A)

Reading bar charts: comparing two sets of data (K-A)

Conditional distributions and relationships (K-A)

Reading bar charts: putting it together with central tendency (K-A)

Marginal and conditional distributions (K-A)

Reading bar graphs (K-A)