I just discovered chalkboard markers. I know they have probably been around for years, but I just bought my first one. It makes very pretty lines on my smooth chalkboard from Hobby Lobby.
Regular chalk has always worked great on my chalkboard I made myself using chalkboard paint. We use it in our school room now.
But, this very smooth store bought chalkboard never looked right using regular chalk. The chalk marker works much better on it. Easily erases with damp cloth.
So look for them at your local Craft Supply store - Chalkboard Markers !!