I suggest scanning your drawing using the FREE APP Cam Scanner.

Available in both formats. It has multiple settings, and is specifically calibrated for pencil drawings. You can square up an image, among many other features.

Scan to .pdf format.

For detailed submission formatting requirements, refer to the instructions posted on the ARCH 1231 Course Hub

For information about how these assignments will be graded, refer to the Drawing Assignment Grading post on the ARCH 1231 Course Hub