#Bash, 151 bytes

Pretty much a straight port of your own answer

t="teen-hundreds were a time for"
for i in {a..y};{
echo "The eigh$t rum.
The nine$t fun.
The two-thousands are a time to run
a civilized classroom."
}

Bash, 151 bytes

Pretty much a straight port of your own answer

t="teen-hundreds were a time for"
for i in {a..y};{
echo "The eigh$t rum.
The nine$t fun.
The two-thousands are a time to run
a civilized classroom."
}

#Bash, 151 bytes

Pretty much a straight port of your own answer

t="teen-hundreds were a time for"
for i in {a..y};{
echo "The eigh$t rum.
The nine$t fun.
The two-thousands are a time to run
a civilized classroom."
}

#Bash, 151 bytes

Pretty much a straight port of your own answer

t="teen-hundreds were a time for"
for i in {a..y};{
echo "The eigh$t rum.
The nine$t fun.
The two-thousands are a time to run
a civilized classroom."
}