This short video and interactive assessment activity is designed to teach fifth graders about adding, subtracting, multiplying and dividing - missing operation.

This short video and interactive assessment activity is designed to teach fourth graders about four operations - missing operation.

This short video and interactive assessment activity is designed to teach fourth graders about adding, subtracting, and multiplying with parentheses - missing operation.

This short video and interactive assessment activity is designed to teach fifth graders about adding and subtracting with parentheses ii.

This short video and interactive assessment activity is designed to teach fifth graders about placing the missing parentheses to make the equation true.

This short video and interactive assessment activity is designed to teach fourth graders about placing the missing parentheses to make the equation true.

This short video and interactive assessment activity is designed to give fourth graders an overview of - thousandths.

This short video and interactive assessment activity is designed to teach second graders an overview - thousandths.

This short video and interactive assessment activity is designed to teach fourth graders about using both division and multiplication - word problems.

This short video and interactive assessment activity is designed to teach third graders about finding the amount of change - multiplication.

This short video and interactive assessment activity is designed to teach third graders about place value problems involving money.

This resource gives information about our solar system which is made up of the sun, planets and all the amazing objects that travel around it. Information about the plant sizes, distances in the solar system and the size and shape of orbits is also explained. The universe is filled with billions of star systems. And the star system we are most familiar with is our own.

This short video and interactive assessment activity is designed to teach third graders about prime factorization.

CK-12 Foundation's new and improved Advanced Probability and Statistics-Second Edition FlexBook introduces students to basic topics in statistics and probability, but finishes with the rigorous topics an advanced placement course requires.

CK-12 Advanced Probability and Statistics introduces students to basic topics in statistics and probability but finishes with the rigorous topics an advanced placement course requires. Includes visualizations of data, introduction to probability, discrete probability distribution, normal distribution, planning and conducting a study, sampling distributions, hypothesis testing, regression and correlation, Chi-Square, analysis of variance, and non-parametric statistics.

CK-12 Advanced Probability and Statistics Teacher's Edition provides tips and enrichment activities for teaching CK-12 Advanced Probability and Statistics Student Edition. The solution and assessment guides are available upon request.

A work in progress, this FlexBook is an introduction to theoretical probability and data organization. Students learn about events, conditions, random variables, and graphs and tables that allow them to manage data.

CK-12 Foundation's Basic Probability and Statistics - A Short Course is an introduction to theoretical probability and data organization. Students learn about events, conditions, random variables, and graphs and tables that allow them to manage data.

This Flexbook is community contributed through ck12.org. It covers three lessons on the Pythagorean Theorem. 1) Introduction and Determining if the Triangle is a Right Triangle, 2) Finding the Hypotenuse, and 3) Finding a leg. It includes step by step instructions, application problems, and answers (at the end of each lesson). Ck12.org material is downloadable, editable, and accessible offline and online.