A center idea from Mary Baumann's room is to lay out cards with letters on them and have the children sort magnetic lower case letters underneath.

Angie Paris sets up a "good graffitti" center in her classroom. Children can use this to practice writing letters, words, or numbers during center time.

   This picture shows a center idea taken from Kerry Astle and Nikki McDonald's classroom. The children sort the magnet letters by capital, lower case, circles, letters with lines, and by colors.
Background picture from Colleen Cook's classroom