calculation of units

Hi,

I am calculating term marks for a report card. I have taught multiple units throughout the term to a number of classes and each unit has it's own mark. When calculating my total term score, I created a new "calculation" column and then did what the instruction said which was to tap on column headers that I wanted to apply to this calculation. It has worked for two of my three classes. The one class I feel I am doing nothing different, but anytime I try to tap on the columns to add to my total calculation it says "you can't add the result column to its own result". I have gone back to see how I have set up my classes, and can't find what I did wrong for this class vs. the other ones.

Thanks.

Hello Demmem,
Make sure you're working with the most recent version of iDoceo first.
Tap on this link, update and give it another try
itunes.apple.com/app/apple-store/id477120941?mt=8