This website offers explorers a way to look up practically any mathematical concept imaginable. It is a virtual dictionary of math terms, but the real reason I like it is that it is ILLUSTRATED so that visual learners (like me) can make sense of the definitions.
For example, I picked a random mathematical term – Denominator and this is what came up.
The bottom number in a fraction.
Shows how many equal parts the item is divided into.
And then a picture…
See- it’s really great!