It is a fun and easy was to assess student answers and learning!
I use this on a weekly basis in my language arts class. You can use any type of clip (to "clip" the correct answer") or you can laminate the sheets and have the students use a dry erase marker.
I have created generic boards. I have also created ones specific for teaching parts of speech, grammar, syllables, word relationships, vowel sounds and sentence parts.
They come in two sizes 8X11 and 4X 5.5