I love the Monster books by Ed Emberly. They are so much fun to read in the classroom. I use these books during October in teaching shapes and drawing on the computer. I begin the activity by reading Go Away Big Green Monster. I created a PowerPoint that goes through the book, too. Students learn all of the different tools in the toolbar as they draw their monsters.
After reading Glad Monster, Sad Monster students draw monsters and explain their feelings. They monster may feel happy, sad, hungry, embarrassed, etc. We also discuss feelings as part of the lesson.
I love the new book by Rebecca Emberly, If You're a Monster and You Know It. It's written like the song If You're Happy and You Know It. It is so cute. There are so many lessons you can create with this book.
Take a look at my activities about monsters. I've included math, literacy and writing activities.
And, if you're really into monsters, join other schools in the Monster Exchange Project. This is a great writing (procedural text) and drawing project that students love.