Related Clues:

• Rudimentary teachings
• Things on a table
• First lessons
• Euclid work
• Mendeleev's tabulation
• Periodic-table listing
• "Sesame Street" teaching
• The basics, as it were
• Thallium and mercury, e.g.
• Basic training
• Grammar-school topic
• Early teachings
• Elementary lessons
• Grade school basics
• First things learned