Chalk is more economical for sure. In elementary schools, I believe teachers are now required to provide their own markers, so parents are asked to bring in a

Chalk is more economical for sure. In elementary schools, I believe teachers are now required to provide their own markers, so parents are asked to bring in a pack of Expo markers as additional supplies. I prefer chalkboards when I teach because no one else disposes of their empty whiteboard markers, so the tray slowly fills with useless hunks of plastic that look identical to the marker you set down. And whiteboard erasers get disgusting pretty quickly.