Question

What it the main difference between an ionic and a covalent bond?

Answer 1

Ionic is the transference of electrons and covalent is sharing 
Also ionic is with metals and non-metals and covalent is just non-metals 

Answer 2

Ionic bonds will be a metal + a nonmetal, and electrons are transferred from the metal to the nonmetal.

A covalent bond will be a nonmetal only. Nonmetals will not give up their electrons so electrons are shared.

I have also written this on the whiteboard in the image provided.