01 / 9Tom Scott≈ approximate level C10:56–1:00 , .
02 / 9Tom Scott≈ approximate level B11:26–1:30
.
03 / 9Practical Engineering≈ approximate level B28:57–9:03
- , .
04 / 9TED-Ed≈ approximate level B20:06–0:19
— .
05 / 9Mark Rober≈ approximate level C14:34–4:41
, .
06 / 9PBS NewsHour≈ approximate level C12:16–2:22
.
07 / 9TED-Ed≈ approximate level B20:18–0:31
, , - .
08 / 9PBS NewsHour≈ approximate level B20:42–0:50
, , .
09 / 9TED-Ed≈ approximate level B24:01–4:08
, .