Alpha-bot is a fabulous Merriam-Webster spelling website for kids.
Student touch the AUDIO button to hear the word spoken aloud.
They then click to drag a letter left or right or up or down-
which causes the entire row or column to move.
They double click a letter to lock in place
and then click the CHECK button to check their answer.
There are three levels and even a hint button if needed.
This site is fabulous on the Smart Board.
Such a fun and different way to practice spelling!