I would suggest to put the info you want in a field where you link it to a separate table, so you would have to add it only once and it will be updated in all the other sheets (as long as they are linked to it).
If that doesn’t solve your issue, please show me a screenshot of what you are trying to do
So my students are listed on each tab and I am looking to add each assignment to each of their tables but hoping I don’t have to do it manually. It will not allow me to add a photo. I need to set it up this way so that when I share it with the individual students they are only able to see their own missed work and not what is related to others’.
If I understand you correctly, each student has his own Table? And there is a Separate Table for Assignments?
If this is correct, please check the below screenshots. Feel free to contact me for any clarification.