Well, I didn't study Iberian alphabet in High School. My partners and I discovered this one day, during a job for a Spanish language class. I discovered this in a Encyclopaedia.

We wanted to make a secret code to write our "chuletas" (notes written in little pieces of paper ready to be copied in the exams) and we decided to use this alphabet. Then, we invented more aphabets to use them in the "chuletas"; the letters of this alphabets were inspired in the "Iberian runes" (this is the way my old classmates called this), and we call it also "Iberian runes" or "new Iberian runes".