1. Web App Simon J. Lancaster University of East Anglia

2. High Tech A variety of audience response solutions exist that facilitate whole class participation. ◦ Dedicated handsets ◦ Smartphone software Disadvantages ◦ Cost ◦ Convenience ◦ Access

3. Low Tech 14 15 16 17 18 19 20 8 There’s much to be said for old fashioned limb waving participation. But we only have so many limbs / digits. Anonymous numbers for electron counting.

4. Intermediate Tech A mobile device substitute for the paper answers. Versatile, flexible, free and with the maximum compatibility. http://www.uea.ac.uk/~c032/CHE2C32/Numbers.htm

5. Simple Example Is this an 18 electron complex?