Values and Shading are drawing terms that are commonly used interchangeably, however they have different meanings and ways to go about learning to use them.
How to Draw: Fun and Easy Ways to Get Started
Painting a stippling powerpoint
Shading & Values: Use the Power of Light & Shadow to Create Realistic Art, Kendyll Hillegas
Analyzing the Elements of Art: Four Ways to Think About Value - The New York Times
Drawing Values vs. Shading - Drawing Evolution
Shading techniques
When making a drawing, is it better to color in the drawing and then add shading, or add the shading first and then color the whole thing? - Quora
Teaching value and shading basics is an important middle or high school art technique to include in any course. This one-day activity focuses on
Middle, High School Art Drawing Intro Value, Shading 1 Day Activity, Worksheet +
Value - Mrs. Cook's Art Class