Understand what your students are learning. Anticipate and identify questions they may have so that you can prepare to follow up. Thank-you notes, drawings, or photographs from students are always appreciated. Scientists especially like to know what students learned and what interested them. Provide feedback about the activity to the scientist.
Scientists are learners, too.
They will respond to your positive reinforcement as well as constructive criticism. Discuss with your students what they learned and what else they want to know. Build on their experience with follow up activities. Incorporate inter-disciplinary activities in writing, spelling, art, social studies, reading, and math. Complete any experiments left by the visitor and let her know the results.