Interestingly, this idea "here a little there a little" comes from a text in Isaiah that isn't actually giving this idea as the way we are to learn.
Isaiah 28:7-14 KJV
7) But they also have erred through wine, and through strong drink are out of the way; the priest and the prophet have erred through strong drink, they are swallowed up of wine, they are out of the way through strong drink; they err in vision, they stumble in judgment.
8) For all tables are full of vomit and filthiness, so that there is no place clean.
9) Whom shall he teach knowledge? and whom shall he make to understand doctrine? them that are weaned from the milk, and drawn from the breasts.
10) For precept must be upon precept, precept upon precept; line upon line, line upon line; here a little, and there a little:
11) For with stammering lips and another tongue will he speak to this people.
12) To whom he said, This is the rest wherewith ye may cause the weary to rest; and this is the refreshing: yet they would not hear.
13) But the word of the LORD was unto them precept upon precept, precept upon precept; line upon line, line upon line; here a little, and there a little; that they might go, and fall backward, and be broken, and snared, and taken.
14) Wherefore hear the word of the LORD, ye scornful men, that rule this people which is in Jerusalem.
The prophet it telling them they are drunks who are like babies, so that they had to be taught like you teach babies,
This is from the NLT:
Now, however, Israel is led by drunks
who reel with wine and stagger with alcohol.
The priests and prophets stagger with alcohol
and lose themselves in wine.
They reel when they see visions
and stagger as they render decisions.
8 Their tables are covered with vomit;
filth is everywhere.
9 “Who does the Lord think we are?” they ask.
“Why does he speak to us like this?
Are we little children,
just recently weaned?
10 He tells us everything over and over—
one line at a time,
one line at a time,
a little here,
and a little there!”
11 So now God will have to speak to his people
through foreign oppressors who speak a strange language!
12 God has told his people,
“Here is a place of rest;
let the weary rest here.
This is a place of quiet rest.”
But they would not listen.
13 So the Lord will spell out his message for them again,
one line at a time,
one line at a time,
a little here,
and a little there,
so that they will stumble and fall.
They will be injured, trapped, and captured.
They are such drunks they are like babies, and like babies God will speak to them, so that they fall and are captured.
This is not an instruction for how to interpret the Bible.