What you need:
Pirate hat or bandana for the teacher (optional for children too!)
Large paper "treasure map" with simple landmarks (X marks the spot!)
Toy treasure chest or decorated box
Gold coins, costume jewelry, shells (small "treasures")
Pirate vocabulary cards (optional)
Storybook about pirates(optional, e.g., "How I Became a Pirate" by Melinda Long) *Amazon Affiliate Link
Treasure Map