Each chapter in the book of James has a two to four themes. If you want to learn the content of the book of James you can learn the themes along with key verses which will help you know what is contained in each chapter and in the book.
I would encourage you to commit these verses to memory. Learning key verses for books of the Bible will help you know what is contained in the book. And, in this case, each of these verses will give you a greater idea of what is in each chapter.
Greeting — James 1:1
James, a servant of God and of the Lord Jesus Christ, to the twelve tribes which are scattered abroad, greeting.
Trails and Temptations — James 1:12
Blessed is the man that endureth temptation: for when he is tried, he shall receive the crown of life, which the Lord hath promised to them that love him.
Doers and Not Hearers Only — James 1:22
But be ye doers of the word, and not hearers only, deceiving your own selves.
Partiality — James 2:1
My brethren, have not the faith of our Lord Jesus Christ, the Lord of glory, with respect of persons.
Faith Without Works — James 2:14
What doth it profit, my brethren, though a man say he hath faith, and have not works? can faith save him?
Controlling the Tongue — James 3:5
Even so the tongue is a little member, and boasteth great things. Behold, how great a matter a little fire kindleth!
Wisdom — James 3:17
But the wisdom that is from above is first pure, then peaceable, gentle, and easy to be intreated, full of mercy and good fruits, without partiality, and without hypocrisy.
Worldliness — James 4:4
Ye adulterers and adulteresses, know ye not that the friendship of the world is enmity with God? whosoever therefore will be a friend of the world is the enemy of God.
Judging One Another — James 4:11
Speak not evil one of another, brethren. He that speaketh evil of his brother, and judgeth his brother, speaketh evil of the law, and judgeth the law: but if thou judge the law, thou art not a doer of the law, but a judge.
Boasting About Future — James 4:14
Whereas ye know not what shall be on the morrow. For what is your life? It is even a vapour, that appeareth for a little time, and then vanisheth away.
Warnings to the Rich — James 5:1
Go to now, ye rich men, weep and howl for your miseries that shall come upon you.
Patience in Afflictions — James 5:8
Be ye also patient; stablish your hearts: for the coming of the Lord draweth nigh.
Prayer — James 5:16
Confess your faults one to another, and pray one for another, that ye may be healed. The effectual fervent prayer of a righteous man availeth much.
Wandering Christians — James 5:20
Let him know, that he which converteth the sinner from the error of his way shall save a soul from death, and shall hide a multitude of sins.
While I have listed these as the key verses to help you learn the topics in each chapter, there could be other verses that you may find to be better in helping you remember each chapter’s content. If you do have another verse that you prefer, post that in the comments below. I am curious as to what stands out as important to others.