| Value | Category | Cases | |
|---|---|---|---|
| 1 | Visible but not used in this lesson | 29 |
24.4%
|
| 2 | Used in this lesson | 27 |
22.7%
|
| 3 | Not visible but available | 9 |
7.6%
|
| 4 | Not available | 54 |
45.4%
|