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

This short video and interactive assessment activity is designed to give fourth graders an overview of area and perimeter of rectangle.

This short video and interactive assessment activity is designed to teach fourth graders about arranging numbers in specific order (numbers to 1,000).

This short video and interactive assessment activity is designed to teach third graders about arranging numbers in specific orders.

This short video and interactive assessment activity is designed to teach fourth graders about arranging and ordering capacities (english units).

CK-12 Basic Physics - Second Edition updates CK-12 Basic Physics and is intended to be used as one small part of a multifaceted strategy to teach physics conceptually and mathematically.

This short video and interactive assessment activity is designed to teach third graders an overview of lines, curves, vertices, and sides of 2d shapes.

This short video and interactive assessment activity is designed to teach second graders an overview of lines, curves, vertices, and sides of 2d shapes.

The Basic Speller is a spelling program for beginning students and consists of eight volumes of 48 lessons each. It presents lessons and practice for learning the relationships between sounds and their spellings.

The Basic Speller is a spelling program for beginning students and consists of eight volumes of 48 lessons each. It presents lessons and practice for learning the relationships between sounds and their spellings.

This short video and interactive assessment activity is designed to teach second graders an overview of simple figure patterns.

This short video and interactive assessment activity is designed to give fourth graders an overview of simple figure patterns.

This short video and interactive assessment activity is designed to teach third graders an overview of simple figure patterns.

This short video and interactive assessment activity is designed to give fifth graders an overview of simple figure patterns.

This short video and interactive assessment activity is designed to teach third graders about before and after problems.

This short video and interactive assessment activity is designed to teach second graders about bills and coins - word problems.

Submitted as part of the California Learning Resource Network (CLRN) Phase 3 Digital Textbook Initiative (CA DTI3), 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.