After speaking with one of my student groups during this lesson, it occurred to me that they were limiting their thinking when I asked them to go back and improve their protocols. This is because the simulator does not give control of the chunk size, as previous versions did. Therefore, students didn’t think to use two-bit codes for sender/receiver because everything was forced into 8-bit chunks.
One suggestion: Have a chunk size controller and set the default to 8 bits, but allow students to go change it later.