How many scientists throw out their notebooks at the end of each year and start over no matter how many empty pages remain? How many of them approach a new research question or experiment without using knowledge gained from the previous years? The answer to each of these questions is of course, few if any, yet we ask our students to do that every…

Categorizing organisms as living or nonliving things may seem to be intuitive by nature. Yet, it is regulated by scientific criteria. Students come to school with rules already in place. Their categorizing criteria have already been influenced by their personal experiences, also known as observations and inferences. They believe that all things…