Provide time to repeat experiments, to practice skills, to research more information, and to heighten understandings. Listen and talk WITH students. Encourage all students to talk and to share their experiences, questions, and ideas. Listen carefully and talk about what they see, think, and feel. Ask questions that can have more than one answer.
Science is about probing questions and searching for answers.
Model that it is okay, in fact necessary, to not have all the answers. Have students search out information as they observe experiments, go to the library, talk with others, and form their own theories based on their experiences. Enthusiasm about science is catching. Let students see your excitement about their projects, experiments, and discoveries. Catch everyday science moments.