Exponents are described as representing repeated multiplication. The zero exponent is explained by observing a pattern that occurs when descending exponent values are applied to a common base.
Introduction To Exponents
Math Antics Intro To Exponents aka Indices
Introduction To Exponents
Algebra Basics Laws Of Exponents Math Antics
Introduction To Exponents
What Is An Exponent An Intro To Exponents Math With Mr J