Swapping blogger user accounts

Our children (who are in a different class this year) will need to swap their last years blogger user details to this years log ins.
At present we are thinking of getting individual e-mails for each child in year 3/4 upwards but for the meantime let's swap to the child's current classes log in details.

We are only going to need to do this with Year 3's that were in room 1 last year and ALL Year 5's.
Not sure how to manage this yet... do I meet with each class of students who need this done during school time or get the ICT club to do this?

Here's what we need to do....
1. Log in to your dashboard with the current user name e.g. room7@vardon.school.nz and enter password (this means year 3's and 5's enter last years e-mail)
2. Go to permissions on the settings page and invite your preferred e-mail (current class email)to be an author.
3. Go to your current classes e-mail and respond as directed to the invitation e-mail.
4. Log in again to permissions on the current account and make the preferred e-mail an administrator.

Check out all admin features while logged in with the preferred e-mail. If all is well, you can remove the old one from the blog.

Do not delete that blogger account, however, as you will lose the images you have uploaded to your blog with that account.