For the uninitiated: AP exams require longform answers. Students can either type their response or upload a photo of handwritten work. Students who choose the latter option can do so as a JPG, JPEG, or PNG format according to the College Board’s coronavirus FAQ.
But the testing portal doesn’t support the default format on iOS devices and some newer Android phones, HEIC files. HEIC files are smaller than JPEGs and other formats, thus allowing you to store a lot more photos on an iPhone. Basically, only Apple (and, more recently, Samsung) use the HEIC format — most other websites and platforms don’t support it. Even popular Silicon Valley-based services, such as Slack, don’t treat HEICs the same way as standard JPEGs.
Bryner says many of his classmates also tried to submit iPhone photos and experienced the same problem. The issue was so common that his school’s AP program forwarded an email from the College Board to students on Sunday including tidbits of advice to prevent submission errors.