Khan Academy: Introduction to Euclidean Geometry: Lines, Line Segments, and Rays

In this introduction to functions video, Sal intuitively defines a function and introduces the function notion f(x). He finishes the video by looking at a simple example of evaluating g(f(x)) without getting into the complexity of...

Introduction to the coordinate plane and plotting points on the coordinate plane. Only quadrant 1 (positive numbers) is covered.

In this video students gain an understanding of basic ideas in geometry and how we represent them with symbols.

Sal uses estimation to introduce dividing by 2-digit numbers.

Models how to create a line plot from a table of data and then interpret it. [4:00]

An all-encompassing package provides video clips that demonstrate real-world activities that have to do with angles. After watching the Cyberchase cartoons, learners discuss why a "v" shape is used to measure a turn. A pair of vital...

Practice drawing parallel and perpendicular lines, line segments, and ray. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Given a linear equation, find the x-intercept and the y-intercept to graph the line. Not sure what to do or where to start? Watch this video and see the instructor break it down and make it understandable.

Sal discusses exponents with bases of 10 and their patterns.

Sal adds tenths, like 0.1+0.8 using visuals and place value.