Step by step downloadable PDF file with pictures and a guide to the step from caterpillar to Monarch Butterfly.
This picture below is one of three cards with 18 full-color photos walking you through the life cycle of a Monarch Butterfly.
You can download the entire PDF file here: Monarch-Step-by-Step
I do grant you permission to print the picture cards on photography paper, for using them in your classrooms.
Print all three on 8×10 photography paper. Laminate the cards, cut them apart and use them in your classroom in science centers or back them with felt to go over the lifecycle of the Monarch Butterfly.