Each week, the group teachers might repeat part of the material relevant for that week. There will be time for giving information about the current obligs and of course opportunity to ask questions. Finally, activities involve solving additional smaller coding exercises. The SICP book actually contains loads of exercises. The group teacher’s page collect a selection of those exercises from the book (including solution) per week.
Those may be addressed in class (though there will not enough time to do them all). If the selection still is not enough, it’s not hard to find complete lists of exercises including solutions on the net. Or use the book, though that is without solutions.