Feathering A Picture in Gimp 2.8

The video by Rayme Pastore below shows you how to feather an image in Gimp 2.8:

Geometry: An Introduction

Both videos are from Khan Academy.

Video 1: An Introduction to Language and Labels in Geometry



Video 2: An Introduction to Lines, Line Segments, and Rays

Continental Drift

The video by Michael Sammartano below explains Continental Drift:

Multiplying Polynomials

The Khan Academy video below shows you how to multiply a binomial by a polynomial:

Test your knowledge with the Khan Academy practice session: Click Here.

Adding and Subtracting Polynomials

Watch the following Khan Academy video to learn how to add polynomials:

How to add polynomials (example): 


Watch the Khan Academy video below to learn how add and subtract polynomials:

Adding and subtracting polynomials:

Plate Tectonics

A nice documentary on plate tectonics from National Geographic.

Introduction to Sedimentary and Metamorphic Rocks

videos by Michael Sammartano