These lessons and activities build on concepts and skills that you have already taught and expand the scope of your instruction through reinforcement and enrichment. Each activity is preceded by the Domain, which is a group of related Standards, followed by the specific Standard that the activity addresses. For example, “Operations and Algebraic Thinking: 4.OA.3” refers to the Domain, which is Operations and Algebraic Thinking, Grade 4, and Standard 3. Next, you will find background information on the topic, the title and a brief summary of the activity, special materials needed for the activity, and any special preparation that is necessary. The activities consist of cooperative learning, technology,and real-world focus . All of the activities include specific steps for implementation, and many include reproducibles. Each standard for grade 3 is supported by at least one activity. The typical activity can be completed in a single class period and focuses on application of concepts or skills, demonstration of understanding, or communication about math. Students may be required to solve problems; create mathematical models, charts, and graphs; conduct investigations with both physical and virtual manipulatives; play mathematical games; and write problems and explanations. Many of the activities are open-ended; however, an answer key is provided for those problems requiring specific answers. Download the sample lesson provided here to review before buying to ensure this file meets your needs.