Here is a simple, colorful sign (which you may customize) which includes some activities I have my kids do--one per day as part of their regular seatwork activities. I have my students use their spelling list words. You could use science or social studies vocabulary as well. Build a Word is where spell a word by writing its 1st letter, then on the next line the 1st + 2nd letter, and so on. Rainbow Spelling is where students write each word using a different crayon each time (as many times as you assign). Story Spelling is them using the words in a story. Rhyme Spell is writing the word and a word which rhymes. Word Sort 2 Ways is them picking a rule or more rules and then sorting them into lists accordingly.