01 / 21Big Think≈ approximate level B15:03–5:09 , .
02 / 21TED-Ed≈ approximate level B23:05–3:13
, .
03 / 21Sprouts≈ approximate level B24:13–4:21
, - , .
04 / 21TED-Ed≈ approximate level B10:55–0:58
, .
05 / 21TED≈ approximate level B17:02–7:13
, .
06 / 21BBC Ideas≈ approximate level B12:10–2:20
.
07 / 21TED≈ approximate level B10:19–0:27
.
08 / 21Sprouts≈ approximate level B23:23–3:28
, .
09 / 21TED-Ed≈ approximate level B22:59–3:07
, .
10 / 21CrashCourse≈ approximate level B14:04–4:14
, - , , .
11 / 21TED-Ed≈ approximate level B21:01–1:13
, , .
12 / 21CNBC Make It≈ approximate level B23:13–3:23
, .
13 / 21Sprouts≈ approximate level A20:50–1:00
: .
14 / 21Sprouts≈ approximate level B26:11–6:24
, , — .
15 / 21TED-Ed≈ approximate level B14:13–4:22
, , .
16 / 21Big Think≈ approximate level C15:55–6:08
, , .
17 / 21CrashCourse≈ approximate level B10:01–0:13
— — , : , , , .
18 / 21CrashCourse≈ approximate level C18:05–8:20
, .
19 / 21Big Think≈ approximate level C15:25–5:36
, - , .
20 / 21TED-Ed≈ approximate level C12:06–2:22
, , , .
21 / 21The New Yorker≈ approximate level C11:12–1:29
, ,