This was an excellent presentation on water treatment. It addresses many types of learning styles incorporating audio, visuals and an activity at the end. The water treatment activity at the end was especially effective as it worked both as an assessment and an interactive tool for the learner that needs to do something, which is not always easily addressed. Near the middle of the presentation there is an interactive chart with was very engaging and interesting, and the video that showed the water treatment process helped to supplement the information already given in a clear and fun way. The introduction was particularly constructive as it provided an explanation for how to use the buttons in the presentation. However, there were a couple of areas that should be looked at for improvement. At one point it was possible to skip to the next slide without answering the questions. And at the activity at the end the slides skipped back to earlier slides then I was never able to get back to that place again. This was really well done, and I learned a lot.