Imvoto is another very useful system enabling immediate assessment of learning to enable teachers to quickly intervene where required to help students progress, tackle misconceptions and move learning on.
This is definitely one to have a look at – you can easily write your own questions to assess your class and students can use a variety of devices to take the assessments, mobiles, tablets or desktops. Questions can also be differentiated depending on student responses. A particularly useful aspect of this tool is that as well as writing your own questions you can share your questions and also discover and use other teachers questions. Another benefit is the ability to include a range of media in your questions, including audio, video, images or LaTex.
Here is a quick introduction video:
There is also an excellent dedicated Imvoto Youtube channel with an excellent collection of videos providing a guide to creating assessments, interrogating data etc.