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Source: https://elearninginfographics.com/the-addie-model-infographic/

The ADDIE model is a five step process for creating instructional products. It begins with the analysis phase where a topic is chosen based on an area of need and a target audience is chosen. The second step is the design phase. In the design phase, objectives are created for the topic and strategies are chosen to help meet the goals the designer would expect to see. The third step is the development phase. In the development phase, the designer is creating the actual instruction for the topic. This included all steps needed in order for students to learn the topic being taught, the materials needed to implement the instruction, and any assessments. This also includes formative evaluations of the design materials to make sure that they align with the objectives. In the implementation phase, this is where the instructional material is put into practice with the intended audience. Finally, the evaluation phase is evaluating how well a student learns the material being presented. 

The ADDIE model is extremely different from other models. Where the Addie model focuses on instructional design, Gagne's Nine Events of Instruction  focuses more on the process to work through the steps of implementing an already created design. It is my understanding that the ADDIE model would be used before Gagne's model as well as during the model for areas such as presenting content and assessing performance.

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Source: https://www.coursearc.com/gagnes-nine-events-of-instruction/

Gagne's Nine Events model is a structure created with nine steps to implement an instructional design. This is done by first gaining the students attention and then informing students of the learning objectives.  The third step is presenting the content to the students. This is where I believe the ADDIE model would be used, to create the content material being presented.  The fifth step is providing guidance to the students, and then giving students the opportunity to practice the presented content. The seventh step  is for the instructor to provide feedback to students. The eighth step is to assess the performance of the students and the final step is to enhance retention. 

While this is a wonderful model, and one I feel that I use often as an educator, I found the ADDIE model a bit more beneficial as it taught me to create the instructional material that I need to teach in the classroom. 

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Source: https://edutechwiki.unige.ch/en/Systematic_Design_of_Instruction

The Dick and Carey Model is a multistep process which includes constant revision throughout the ID model process. 

Step 1: Identify Instructional Goals or Need

Step 2:  Conduct Instructional Analysis and Identify Entry Behaviors

Step 3: Write Performance Objectives

Step 4: Develop Criterion-Reference Tests

Step 5: Develop Instructional Strategy

Step 6: Develop and Select Instructional Materials

Step 7: Develop and Conduct Formative Evaluation

Step 8: Develop and Conduct Summative Evaluation