pixabay and wikimedia.
It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
This image was acquired from
Keywords from Image Description:
glasses read learn book text highlighter pen intellectual formed education training reading glasses Hora de estudio. es Un libro un resaltador unas gafas reprensentando el aprendizaje other versions cczero Learning Glasses Highmark Books
Page 2017 Free-images.com. All images are Public Domain