Answer:

abcs

Answer	Crossword Clue
ABCS	Grade-school basics
ABCS	The basics
ABCS	Basics

ABCS	Primer lessons
ABCS	Elementary beginning
ABCS	Fundamentals
ABCS	Tots' basics
ABCS	Basic instructions
ABCS	Nuts and bolts
ABCS	Rudiments
ABCS	Basic lessons

ABCS	Basic learning
ABCS	Early lesson
ABCS	First stuff to learn
ABCS	Grammar-school topic
ABCS	Kindergarten learning
ABCS	Basic facts
ABCS	Basic principles
ABCS	Elementary teachings

ABCS	Essentials
ABCS	Grade school basics
ABCS	Kindergarten recitation
ABCS	Primer subject
ABCS	Kid stuff
ABCS	School basics
ABCS	Basic lesson
ABCS	Early instruction

ABCS	"Now I know my ..": line in a tots' song
ABCS	"Sesame Street" basics
ABCS	Primer basics
ABCS	Elementary school basics
ABCS	First grade basics
ABCS	Lessons learned early
ABCS	Preschool lessons
ABCS	Simple stuff

ABCS	Elementary lessons
ABCS	Preschool basics
ABCS	Kindergarten basics
ABCS	Kindergarten lessons
ABCS	Letters for Dick and Jane