| Similarity | Rank | |
|---|---|---|
| American_history | 0.820 | 28141 |
| World_history | 0.730 | 92874 |
| world_history | 0.719 | 28733 |
| European_history | 0.684 | 79644 |
| social_study | 0.655 | 20655 |
| civics | 0.636 | 66474 |
| in_American_history | 0.630 | 33694 |
| Social_Studies | 0.619 | 26191 |
| American_government | 0.618 | 96293 |
| American_Literature | 0.605 | 97833 |
| the_Civil_Rights_Movement | 0.594 | 62659 |
| American_literature | 0.590 | 78300 |
| modern_history | 0.579 | 93951 |
| in_U.S._history | 0.579 | 60655 |
| history | 0.570 | 354 |
| the_American_revolution | 0.568 | 61560 |
| the_Civil_War | 0.562 | 11655 |
| the_American_Civil_War | 0.556 | 99889 |
| the_U.S._Constitution | 0.554 | 39734 |
| Civil_Rights | 0.552 | 35401 |
| music_history | 0.551 | 86096 |
| language_art | 0.550 | 41786 |
| American_politics | 0.544 | 72074 |
| history_lesson | 0.543 | 90908 |
| Jewish_history | 0.542 | 58258 |