01 / 30Practical Engineering≈ approximate level B25:03–5:10 .
02 / 30Tom Scott≈ approximate level A28:10–8:13
.
03 / 30Practical Engineering≈ approximate level A24:12–4:16
, , .
04 / 30Practical Engineering≈ approximate level C110:45–10:50
.
05 / 30Practical Engineering≈ approximate level B28:18–8:24
, .
06 / 30Practical Engineering≈ approximate level A24:28–4:32
.
07 / 30Practical Engineering≈ approximate level B23:33–3:37
, .
08 / 30Practical Engineering≈ approximate level B13:45–3:49
.
09 / 30Practical Engineering≈ approximate level B14:16–4:23
, .
10 / 30Practical Engineering≈ approximate level C14:17–4:24
, ’s - .
11 / 30Practical Engineering≈ approximate level B24:16–4:22
.
12 / 30Practical Engineering≈ approximate level B24:23–4:29
, , .
13 / 30Practical Engineering≈ approximate level B26:48–6:54
, , .
14 / 30Mark Rober≈ approximate level C12:27–2:31
, .
15 / 30Practical Engineering≈ approximate level B26:35–6:42
, .
16 / 30Practical Engineering≈ approximate level C13:32–3:38
.
17 / 30Mark Rober≈ approximate level C112:11–12:15
.
18 / 30Practical Engineering≈ approximate level B25:40–5:48
, , .
19 / 30TED-Ed≈ approximate level C12:17–2:26
, .
20 / 30Practical Engineering≈ approximate level B22:38–2:48
’s .
21 / 30SmarterEveryDay≈ approximate level B21:44–1:49
, , .
22 / 30Mark Rober≈ approximate level C112:27–12:35
, , , .
23 / 30Practical Engineering≈ approximate level A22:10–2:15
.
24 / 30Mark Rober≈ approximate level C12:14–2:19
, .
25 / 30SmarterEveryDay≈ approximate level B13:49–3:54
, , , ?
26 / 30Practical Engineering≈ approximate level C16:20–6:25
.
27 / 30The Daily Show≈ approximate level B18:07–8:10
.
28 / 30Practical Engineering≈ approximate level C16:58–7:04
, .
29 / 30Practical Engineering≈ approximate level B16:42–6:48
, ’s .
30 / 30Practical Engineering≈ approximate level C10:13–0:23
, - .