Follow this link and make a copy of the Research Log for your Digital Map Portfolio.
Use this document to take notes about StorymapJS, keep track of your images, sources for slide text, etc.
Search Google for images, as it has a feature to help you easily find images legally available for your use
Note: Some images have multiple licensing options -- just be sure to use the license with the fewest restrictions! Also, if the image is noted as being in the "Public Domain," one can use it without attribution or linking to a license.
Use this link to access StorymapJS.