@JW3, for learning purposes, you could give this coin a quick wash in acetone. If a black marker was used, then the ink will quickly come off. If not, then I think that @E&V is right and the copper was removed leaving the underlying zinc core visible. In the end, this cent is only worth face value.
"If you climb a good tree, you get a push."
-----Ghanaian proverb
"The danger we all now face is distinguishing between what is authentic and what is performed."
-----King Adz