Here is an assignment that I have given my upper elementary students the years we didn’t have an adopted health curriculum. I was fortunate to have collected small sets of trade books on different body systems. If this was a research project early in the year, I made it a group assignment.
My version of group assignments mean people work together and help each other, but everyone needs to create their own product and fill out individual handouts. I find this cuts down on one person doing the assignment and everyone else getting credit.
Also, when students would give their oral presentation, I let the group stand together. If it was an independent assignment, I let students use the buddy system. Public speaking isn’t as scary when you have a friend standing next to you.