Building a Fence: Repeating Sections

Learning Objectives Identify a repeating pattern in a sequence. Define a 'loop' as a repeating action. Break a large task into small, repeatable sections. Count the number of times a section repeats. Follow a simple algorithm with a loop to build a structure. Check their work to see if the pattern is correct. Have you ever built a tower with blocks? 🧱 What if you had to build a very long fence for a puppy? 🐶 Today, we will learn how to do things over and over again. This is called a loop! It helps us build big things from small, repeating parts. Real-World Applications A song's chorus repeats 🎶 Brushing your teeth is a repeating motion 🦷 Stairs are the same step, over and over 🪜 A train has many of the same train cars 🚂

TermDefinitionExample RepeatTo do the exact same thing again. 🔁Clap your hands. 👏 Now, repeat! 👏👏 LoopAn instruction that tells a computer to repeat something.A loop can tell a robot to take 5 steps forward. 🤖➡️➡️➡️➡️➡️ SectionOne small part of a pattern that repeats.In a fence, one post and one rail is a section. 🪵➖ PatternSomething that is arranged following a rule or rules.Apple 🍎, Banana 🍌, Apple 🍎, Banana 🍌 InstructionOne single step in a set of directions.'Pick up the blue block' is one instruction. 🔵 AlgorithmA list of steps to finish a task, like a recipe. 📝1. Get bread. 2. Get jelly. 3. Spread jelly. This is a sandwich algorithm!

The Pattern Rule 1. Find the Section. 2. Count the Repeats. Use this to figure out how to build something big. First, find the small part that repeats. Then, count how many times you need to make it. The Build-One-First Rule Build one section perfectly. Then, copy it. Before you repeat, make sure your first section is exactly right. This stops mistakes from being repeated over and over.