I have a drawer full of different kinds of markers.
The one I prefer is the dissappearing ink marker. It works the best but is time sinsitive. You cannot leave it overnight or it will go away.
I also like the Wonder Marker water remover pen when I need to leave the marks on for awhile.
I have pounce in white and blue but so many fabrics dont show the chalk marks.
Most pencil markers just wont mark for me except for actual pencils, they work and so far they have washed out.
I have tried the chalk square markers and they work well but you cant do many designs with it.