Click on the link below for the "2-58 Student eTool" (CPM).
1. The user can:
- Drag tiles from the tray to the Display area.
- Click tiles to change color to black.
- Drag a textbox to the display area to label or explain.
![](https://media.screensteps.com/image_assets/assets/005/127/965/original/8ca5e694-ec1b-4cfd-8ab8-a4e7ae39df55.png)
2. Build the expressions by:
- Displaying the correct number of positive and negative tiles.
- Clicking tiles which result in a value of 0 turning them black.
- Using a textbox to write the answer.
![Build the expressions by:](https://media.screensteps.com/image_assets/assets/005/127/972/original/42e9d9b8-b6aa-48c7-95e9-78521602b1c6.png)