Abstract
The majority of astronomy teachers, especially active ones, tend to teach concepts based on the newest theories. One typical example is the concept that Earth rotates around the Sun. For school students, any concept may not be obvious, but is usually obtained from their
daily lives. We would like to stress, therefore, that not only different astronomical items but also scientific ones should be properly taught in school, depending on students' grade, level of ability, level of interest in the topic, and expected future jobs. Teachers should not teach the same concept on the same level to all students.
