# Grade 2 Module 5: Addition and Subtraction Within 1,000 with Word Problems to 100

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In Module 4, students developed addition and subtraction fluency within 100 and began developing conceptual understanding of the standard algorithm via place value strategies. In Module 5, students build upon their mastery of renaming place value units and extend their work with conceptual understanding of the addition and subtraction algorithms to numbers within 1,000, always with the option of modeling with materials or drawings. Throughout the module, students continue to focus on strengthening and deepening conceptual understanding and fluency.

Material Type: Module

# Multiples and Common Multiples

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This problem uses the same numbers and asks similar mathematical questions as "6.NS The Florist Shop," but that task requires students to apply the concepts of multiples and common multiples in a context.

Material Type: Activity/Lab

Author: Illustrative Mathematics

# Patterns in the Multiplication Table

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The goal of this task is to look for structure and identify patterns and then try to find the mathematical explanation for this. This problem examines the ''checkerboard'' pattern of even and odd numbers in a single digit multiplication table.

Material Type: Activity/Lab

Author: Illustrative Mathematics

# 5.MD Using Volume to Understand the Associative Property of Multiplication

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This is a task from the Illustrative Mathematics website that is one part of a complete illustration of the standard to which it is aligned. Each task has at least one solution and some commentary that addresses important asects of the task and its potential use. Here are the first few lines of the commentary for this task: Make sure you have plenty of snap cubes. Build a rectangular prism that is 2 cubes on one side, 3 cubes on another, and 5 cubes on the third side. We w...

Material Type: Activity/Lab

Author: Illustrative Mathematics

# Grade 3 Module 4: Multiplication and Area

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In this 20-day module students explore area as an attribute of two-dimensional figures and relate it to their prior understandings of multiplication. Students conceptualize area as the amount of two-dimensional surface that is contained within a plane figure.  They come to understand that the space can be tiled with unit squares without gaps or overlaps.  They make predictions and explore which rectangles cover the most area when the side lengths differ.  Students progress from using square tile manipulatives to drawing their own area models and manipulate rectangular arrays to concretely demonstrate the arithmetic properties. The module culminates with students designing a simple floor plan that conforms to given area specifications.

Material Type: Module

# Multiply Numbers with the Associative Property

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This short video and interactive assessment activity is designed to teach fourth graders about shortening multiplication expressions.

Material Type: Assessment, Interactive, Lecture

# The Florist Shop

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This task provides a context for some of the questions asked in "6.NS Multiples and Common Multiples." A scaffolded version of this task could be adapted into a teaching task that could help motivate the need for the concept of a common multiple.

Material Type: Activity/Lab

Author: Illustrative Mathematics

# Symmetry of the Addition Table

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The goal of this task is to help students understand the commutative property of addition by examining the addition facts for single digit numbers. This is important as it gives students a chance, at a young age, to do more than memorize these arithmetic facts which they will use throughout their education.

Material Type: Activity/Lab

Author: Illustrative Mathematics

# Achieve OER Evaluation Tool

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Learn how to use OER Common Common Core Alignment and Evaluation Tool to align appropriate resources to the Common Core State Standards, and to evaluate the resource against certain aspects of quality.Remixed from "Common Core Alignment and OER Evaluation Tool" by userLetha Goger

Material Type: Teaching/Learning Strategy

Author: Mindy Boland

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Walk-through of sharing an OER Commons resources to Google Classroom.

Material Type: Teaching/Learning Strategy

Author: Mindy Boland

# How to Use the OER Commons LTI 1.1 Tool

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This guide gives a comprehensive overview of using the OER Commons LTI tool.

Material Type: Teaching/Learning Strategy

Author: Mindy Boland

# #GoOpenUSVI Training

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This document will be used for initial training on the #GoOpenUSVI Microsite.  Educators will be able to return here as often as needed.

Material Type: Activity/Lab

Author: Yvette McMahon-Arnold

# Open Educational Resources & Practices Starter Kit

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This Open Educational Resources & Practices Starter Kit is designed to support educators and librarians begin their OER journey of identifying, evaluating, curating, and authoring/remixing.

Material Type: Activity/Lab

# ISKME's Open Educational Practice Rubric

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This rubric defines a set of open educational practices that help educators to advance a classroom and school culture of open education and to advocate for the potential benefits of open educational resources (OER) in the context of continuous improvement. The rubric is intended to guide educator practice in working with OER to ensure that every student has the opportunity to engage in learning effectively. The rubric supports educators in accessing, curating, evaluating, and adapting OER in response to students’ particular needs, interests, and contexts, to author and share original or remixed resources, and to disseminate approaches to the implementation of those resources for future OER users to benefit from.

Material Type: Teaching/Learning Strategy

Authors: Mindy Boland, Megan Simmons

# Permission Guide for Educators

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This guide provides a primer on copyright and use permissions. It is intended to support teachers, librarians, curriculum experts and others in identifying the terms of use for digital resources, so that the resources may be appropriately (and legally) used as part of lessons and instruction. The guide also helps educators and curriculum experts in approaching the task of securing permission to use copyrighted materials in their classrooms, collections, libraries or elsewhere in new ways and with fewer restrictions than fair use potentially offers. The guide was created as part of ISKME's Primary Source Project, and is the result of collaboration with copyright holders, intellectual property experts, and educators.* "Copyright license choice" by opensource.com is licensed under CC BY-SA 2.0.