I would like the ability to copy 2 columns at the same time. Every time I need to add a day, I can't just hit the plus column button because I put in 2 columns of data every class period, one for attendance and another for participation. The color, size, and edit options then are all wrong for the next added column. I don't want this second data in a new tab because when I record them on our online grade books I would have to keep flipping back and forth.

Yup, count on this for our next major update.
It will take some time but we'll have this feature