Answer:
1. It should be a requirement for public schools to teach computer literacy classes to students by the 9th grade.
2. Computer literacy classes should be required for public schools to teach to students by the 9th grade.
3. Students, by the the 9th grade, should have been taught computer literacy classes by public schools.
Explanation:
1. Highlights the requirement
2. Highlights importance of computer literacy classes
3. Highlight student knowledge
