Hi Paula!
Congratulations on your surgery, and I hope you are feeling well.
I was banded on August 6th, and my first day of teacher inservice was the 14th. I felt fine; I just had kids come up and help with the pushing and lifting.(1/2 workday)
I was on full liquids then, so I wasn't feeling weak and tired from having Clear Liquids only, actually pretty lively with some real, though liquid, food in me. I kept a huge mug of Water with me constantly so that I wouldn't get dehydrated.
Good Luck!