Aoife,
there is more information about the Drinking Gourd here. I’d suggest reviewing the night sky in class and then setting a homework of viewing it. You might use this resource from SpaceWeek.ie The Plough Clock with an older class, this will show the Plough in the correct orientation for the time of night and time of year.
Their own version of the Plough is part of this activity.
Both of these Plough themed activities can assist the children in identifying the asterism of the Plough, but I think it would be tricky to extend this into a true Inquiry activity that uses the full Framework of Inquiry as outlined in Module 1.
