Related Clues:

• 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
• Lincoln pub given the go-ahead in key letters
• Some rote learning
• Basics for beginning readers
• "Sesame Street" skills
• 17-, 25-, 35- and 50-Across consist only of letters from the second half of it
• A word of twenty-six letters
• First elements (of language)
• 'Here Come the ___' (They Might Be Giants kids' album)
• Runs in preschool
• Metaphorical ropes
• What the first and last letters of 13 answers in this puzzle proceed through