01 / 30TED-Ed≈ approximate level B10:24–0:30 , - .
02 / 30TED≈ approximate level A21:13–1:18
, .
03 / 30BBC Ideas≈ approximate level A20:53–0:57
.
04 / 30Practical Engineering≈ approximate level B27:29–7:33
, .
05 / 30Practical Engineering≈ approximate level C11:18–1:23
, .
06 / 30Practical Engineering≈ approximate level A24:57–5:02
, .
07 / 30Sprouts≈ approximate level B22:08–2:15
, 's .
08 / 30Practical Engineering≈ approximate level B25:27–5:34
( ), , .
09 / 30TED≈ approximate level B23:18–3:22
, .
10 / 30TED≈ approximate level A27:32–7:37
, .
11 / 30Practical Engineering≈ approximate level B14:41–4:48
, , .
12 / 30Mark Rober≈ approximate level C110:27–10:35
, , , .
13 / 30Sprouts≈ approximate level C13:52–4:02
, , .
14 / 30Big Think≈ approximate level A29:07–9:15
, .
15 / 30CrashCourse≈ approximate level B21:28–1:38
, , .
16 / 30CrashCourse≈ approximate level C15:14–5:23
, , .
17 / 30TED-Ed≈ approximate level B22:28–2:41
, - ; ; .
18 / 30Sprouts≈ approximate level B11:50–1:59
, , , .
19 / 30SciShow≈ approximate level C12:20–2:29
’s , , .
20 / 30CrashCourse≈ approximate level B22:18–2:25
, .
21 / 30Kurzgesagt≈ approximate level B23:18–3:26
, , .
22 / 30TED-Ed≈ approximate level A20:41–0:45
.
23 / 30Practical Engineering≈ approximate level B21:09–1:20
, , .
24 / 30Sprouts≈ approximate level B21:28–1:41
, , , , .
25 / 30Vogue≈ approximate level A21:23–1:30
- .
26 / 30TED≈ approximate level A23:34–3:39
.
27 / 30SciShow≈ approximate level B14:05–4:09
.
28 / 30CrashCourse≈ approximate level B210:47–10:53
- — .
29 / 30Practical Engineering≈ approximate level B25:10–5:19
, , .
30 / 30Tom Scott≈ approximate level C15:03–5:11
, , , , , .