Topic intro: Criteria and constraints
The topic opens on a scene and a question. It teaches nothing and coins no word; the lessons close the gap.
The script (narration and what is on screen)
| # | Narration | On screen |
|---|---|---|
| 1 | Here's Mr. Park's class. Pencils roll off the desks all day long. | a classroom; one desk in front; Mr. Park, a whole figure with plain oblong arms, walks past and his arm brushes two pencils off the desk edge; they drop to the floor; no title slide |
| 2 | So Mr. Park sets a challenge: design a pencil holder for your desk. | Mr. Park, a whole figure with plain oblong arms, no fingers, at the front; speech chip DESIGN A PENCIL HOLDER |
| 3 | Erin builds a tall one with stars on it. Luis builds a short, plain one. | two holders side by side on a desk: Erin's tall and narrow with stars, Luis's short and wide and plain; chips ERIN and LUIS under them |
| 4 | Someone bumps the desk. Erin's holder tips over. Luis's holder stays up. But Erin's used less cardboard, and it looks great. | the desk wobbles with short motion lines; Erin's holder tips and its pencils spill; Luis's stays upright |
| 5 | So which holder is better, and how would you decide before anyone starts arguing? | a question mark between the two holders |
| 6 | To find out, we will look at what a design must do, what it may use, and how to test it fairly. | the two holders stay; the question mark fades |
| 7 | Okay, so are you ready to find out how to tell if a design really works? | three printed chips appear under the holders, reading exactly YES, LET'S GO! / NOT SURE YET / LET ME WATCH THAT AGAIN; they are never spoken |
After the video
An intro ends on a ready line and a poll with no wrong answer, never a question.
After the video
Okay, so are you ready to find out how to decide?