| ★ |  Order of operations example | Arithmetic properties | Pre-Algebra | Khan Academy | | — | Estados Unidos | |
| 1 |  Introduction to order of operations | Arithmetic properties | Pre-Algebra | Khan Academy | | — | Estados Unidos | 89 |
| 3 |  Currently, Thus, Despite | Vocabulary | Khan Academy | | — | Estados Unidos | 70 |
| 6 |  Contradiction | Vocabulary | Khan Academy | | — | Estados Unidos | 67 |
| 8 |  Accumulate, Vast, Consist | Vocabulary | Khan Academy | | — | Estados Unidos | 65 |
| 10 |  Stereotype, Obstacle | Vocabulary | Khan Academy | | — | Estados Unidos | 64 |
| 11 |  Symbol, Persuade, Signify | Vocabulary | Khan Academy | | — | Estados Unidos | 63 |
| 16 |  Express, Immersive | Vocabulary | Khan Academy | | — | Estados Unidos | 61 |
| 17 |  Project preview: Book synopsis | Intro to CS - Python | Khan Academy | | — | Estados Unidos | 61 |
| 19 |  Inexplicable, Interrogate | Vocabulary | Khan Academy | | — | Estados Unidos | 60 |
| 4 |  Object composition | Intro to CS - Python | Khan Academy | | 13.5K | Estados Unidos | 69 |
| 2 |  Tracing objects | Intro to CS - Python | Khan Academy | | 8.4K | Estados Unidos | 71 |
| 5 |  Software and abstraction | Intro to CS - Python | Khan Academy | | 6.4K | Estados Unidos | 68 |
| 9 |  Reimagining Student Assessment with Khan Academy | | 3.4K | Estados Unidos | 65 |
| 18 |  Essential, Advance, Longevity, Modify | Vocabulary | Khan Academy | | 1.7K | Estados Unidos | 60 |
| 7 |  Objective | Vocabulary | Khan Academy | | 1.4K | Estados Unidos | 66 |
| 13 |  Demonstrate, Hypothesis, Accurate | Vocabulary | Khan Academy | | 1.1K | Estados Unidos | 62 |
| 12 |  Elaborate, Necessity | Vocabulary | Khan Academy | | 1.1K | Estados Unidos | 62 |
| 14 |  Adapt, Collaborate, Criticize | Vocabulary | Khan Academy | | 502 | Estados Unidos | 62 |
| 15 |  The Learner Dashboard | Codecademy Teams | | 135 | Estados Unidos | 61 |