Biology Cell Test using Interactive Response Devices

I've been working to develop a test for my Biology students. We have been studying cells so tonight I developed a summative assessment to give my students. I use individual response devices from TurningTechnologies. The software interfaces between PowerPoint and the receiver. Because of this technology, I was able to develop this test including many color pictures (including some taken through the microscope.) This test also includes video clips (because I had the ability and it fit my material.) I appreciate the ability to challenge my student's thinking through higher levels of Bloom's Taxonomy. While it is difficult, I find it is possible to create challenging questions that are more than just "recall." My favorite part of this is how quickly students get feedback. With each question, I have set the program to:
1. Show by percentage the number of students who choose each answer.
2. Show the correct answer after the question is completed.