01 / 16TED-Ed≈ approximate level B10:50–0:58 , ’s .
02 / 16Lex Clips≈ approximate level B15:54–5:59
, .
03 / 16TED≈ approximate level B25:36–5:42
.
04 / 16CrashCourse≈ approximate level A28:37–8:40
’s .
05 / 16The School of Life≈ approximate level B10:04–0:09
, .
06 / 16The School of Life≈ approximate level B10:03–0:08
, .
07 / 16PBS NewsHour≈ approximate level A25:13–5:15
.
08 / 16The School of Life≈ approximate level A21:57–1:59
.
09 / 16Lex Clips≈ approximate level C15:22–5:27
, .
10 / 16PBS NewsHour≈ approximate level A20:31–0:35
.
11 / 16BBC Earth≈ approximate level B11:56–2:00
, .
12 / 16The Daily Show≈ approximate level B21:07–1:11
, , .
13 / 16TED≈ approximate level B10:19–0:26
, .
14 / 16PBS NewsHour≈ approximate level B24:56–5:04
, .
15 / 16CNBC Make It≈ approximate level B26:04–6:10
, .
16 / 16TED-Ed≈ approximate level C12:06–2:22
, , , .