If you are a member with an admin status, you have more options for inviting groups compared to a member without admin rights. You must be in the admin mode (the green side) to access your admin rights.
For instance, supposing you are the Class Admin for Year 3, which has two classes in it. You have a child in 3b, but you want to set up a community event for the whole year group: you need to be in the green admin mode to be able to invite the other class (class 3a) as well as your own child's class. if you stay in the blue parent mode you can only invite class 3b. In fact, so long as you are in the green admin mode you can add other year groups, classes or the whole school to the invitation, even if you are not Class Admin for those groups.
At the moment when you send out invitations to an event, if a member who is being invited has more than one child, you cannot specify which child is invited. If you are a parent organising a private event this may not be a problem because the numbers involved are usually small, and you can tell the parents individually if they aren't sure which one of their children is invited. However if you are managing invitations and guest lists for large community events it can be rather confusing. We are working hard on a way to improve this!
In the meantime, you can use the title or description to help specify. For instance if a Class Admin organises an event for Year 6 and calls it 'Year 6 Leavers Picnic in the Park', rather than simply 'Picnic in the Park', any parent who is invited who has children in lower years as well as Year 6 will understand that the invitation they have received is aimed at their Y6 child, not the younger ones.
You can track invitations via the manage guests page, but occasionally you may find that the number of people invited and the number of people displayed in the school structure for the invited group do not exactly match. This could be for several reasons, because the invitation goes out to the adult/s registered on the Classlist site rather than the child, and whole school or whole school group invitations also go to invited parents (non member contacts) who have not yet registered. For instance when the whole school is invited, a parent with two children in different year groups will only receive one invitation, rather than one for each child. Equally if a child has more than one adult associated with them (eg Mum and Dad, or Dad and Grandparent) both adults will receive an invitation.
Any parent who joins a school, year or class after a community event becomes live, will also immediately be able to view and RSVP to any community events for their group/s, although they won't be automatically sent a notification or invitation.