Provided is a system configured to read an original document and submit the generated image data to the education management system, easily. A method of controlling an image processing apparatus includes reading an original document, specifying an assignment, receiving, from a first server, storage location information indicating a storage location in a second server corresponding to the specified assignment, transmitting image data generated by reading of the original document to the storage location indicated based on the received storage location information, and notifying the first server of identification information for identifying the image data.