You are teaching 4th grade science to a group of 9- and 10-year-old students

What can you expect from them with regards to the scientific method, and are there things that you, as the teacher, can do to help your students improve their scientific reasoning?
What will be an ideal response?

A good answer will be similar to the following:
Nine and 10-year-old children, and even adolescents, typically have some conspicuous faults when it comes to skills associated with real scientific reasoning. They often devise experiments in which variables are confounded; they often reach conclusions prematurely, basing them on too little evidence; and they often have difficulty integrating theory and data. However, even young children can be trained to think more scientifically. As a teacher, you can train your 4th grade students to avoid confounded experiments by manipulating one variable at a time. To do this, show your students both confounded and unconfounded experiments, then illustrate the difficulty in drawing clear conclusions from confounded experiments. This can result in long-lasting improvements in children's understanding of well-designed experiments.