| Value | Category | Cases | |
|---|---|---|---|
| 1 | Visible but not used in this lesson | 41 |
34.5%
|
| 2 | Used in this lesson | 19 |
16%
|
| 3 | Not visible but available | 11 |
9.2%
|
| 4 | Not available | 48 |
40.3%
|