Stop the "Is it the inside or the outside?" confusion! 🛑 This complete Fences & Fields unit makes mastering perimeter hands-on, visual, and "sticky" for your 3rd graders. From calculating the borders of a pixel-art "Perimeter Zoo" to designing their own dream playground, this resource moves students from counting grid lines to solving real-world engineering problems. Perfect for introducing Common Core 3.MD.D.8, this packet balances scaffolded practice with creative application. 📂 What’s Ins