Related Clues:

• Weather; components
• Nitrogen and oxygen, e.g., make the weather
• Components or weather conditions
• Factors
• Items on the periodic table
• Basics to learn
• Basic preschool learnings
• Educational foundation
• Simple studies
• Educational basics
• Essential parts for people in steel construction
• They have the same exactly melody as 'Twinkle, Twinkle'
• Like the first thing you learn
• They may be taught with a song
• Rudiments of a subject