01 / 16Big Think≈ approximate level A26:28–6:30 ,
02 / 16The Economist≈ approximate level A21:46–1:49
, .
03 / 16Lex Clips≈ approximate level B15:41–5:48
, , , .
04 / 16Lex Clips≈ approximate level B27:54–7:59
, , .
05 / 16WIRED≈ approximate level C13:24–3:32
, .
06 / 16WIRED≈ approximate level A24:18–4:24
, .
07 / 16CrashCourse≈ approximate level B110:09–10:20
’s , , .
08 / 16TED-Ed≈ approximate level A23:45–3:53
’s , .
09 / 16PBS NewsHour≈ approximate level A20:40–0:48
, .
10 / 16PBS NewsHour≈ approximate level C12:57–3:02
' .
11 / 16PBS NewsHour≈ approximate level A20:10–0:18
, .
12 / 16WIRED≈ approximate level C15:52–6:01
, , .
13 / 16TED≈ approximate level B24:53–5:04
.
14 / 16BBC Ideas≈ approximate level C14:17–4:30
, - , , .
15 / 16PBS NewsHour≈ approximate level B13:07–3:18
, , , , .
16 / 16The New Yorker≈ approximate level C12:27–2:37
, , .