5 pages.

Besides all of those math activities, add some word fun to your 100 Day celebration.  Using the letters in the words one hundred, challenge your students to list as many words as they can think of, before 100 seconds is up and the timer rings.  Who thought of the most words?  Who had the longest word? 

I've included my list of 105 words that I thought of.   After students share their lists, share yours and have students look up any words that they don't know.

I also did a bit of research about the longest recorded words, and included my discoveries.  I even found a word with 100 letters in it! Why not give students some computer time to see what they come up with.