Yes, we had a guest speaker, Paul Kim from Stanford University and I was also impressed with his ideas and works. I believe that mobile devices are great to empower learning and teaching. As you mentioned, Dr. Kim works in rural areas and undeveloped counties where it is difficult to access and use technology and the results article about mobile devices indicates mobile devices make students more motivated to use them to learn something, which facilitates participatory learning. However, I wonder how much mobile devices can be attractive and useful for students who have a various technologies options to use in their classroom and what results would happens if De. Kim researches about mobile devices in developed countries.