The golden rule is to keep your direct teaching under 20 minutes. Nobody wants to listen to a teacher talk for more than that!
You’ve got twenty minutes to inform the children what they will learn.
Inspire them to want to go away research more and encourage them to develop a list o research questions around the subject.
Your twenty minutes has to be a showstopper. Make it as tactile as possible. As the teacher envisage your class going home and saying to mum or dad, “Did you know that the Quetzalcoatlus Northropi was the Largest known flying animal to ever exist.”
If they are repeating your lessons at home to their parents then you’re 90% if the way there!!!
Maybe start tomorrow’s class with this image!