Students develop an understanding of the relationship between the binary number system and computer logic. Also, students learn how to convert Base 10 numbers into binary and vice versa. Character representation of binary codes is explored. Students have the opportunity to experiment in writing their own message and decoding. No computer necessary. Grades 9-10. Prior knowledge: decimal number system and place value.ACM K-12 CS CurriculumStudents (Instructional Materials)none