Khan Academy
Number Sets, Fractions, Pre-Algebra
Knowing mathematic terminology is vital for building a functional academic vocabulary. In this video, Sal defines number sets and the terms natural numbers, whole numbers, integers, rational numbers, irrational numbers, and real numbers....
Curated OER
The Equals Sign
Oh my goodness! A teacher splits into double to show what the equals sign means. She defines the term and provides a pictorial and mathematical example of things that are equal. Wonderful for visual learners.
Curated OER
Fraction Terms
A pint sized math master shares what he knows about fractions. He clearly defines what the denominator and numerator is, what they represent, and what a fraction is. He is a little flustered and his delivery is rushed, but he's got a...
Curated OER
Finding the Reciprocal
Can the concept of finding the reciprocal be shown in 50 seconds? Sounds impossible but Fraction Freddy literally flips over to show what the inverse of 4/5 is. Kids will love the highly visual elements used to demonstrate the term...
Curated OER
Basics of Ratios
A good definition of a mathematical vocabulary term is worth its weight in gold. This video tutorial defines the term ratio, provides three different ways ratios are expressed, and gives a real-life ratio example. Good video for those...