This activity is extremely useful for both Maths and Science educators.  Using the drawing tools you can find in MS Word, you can draw diagrams such as this electrochemical cell.

Before you start you should open the drawing toolbar by clicking on:

>View >Toolbars >Drawing.

The Zinc-Copper Electrochemical Cell

1. On the drawing toolbar, click AutoShapes. From the choice of "Basic Shapes" choose "can".  
2. Drag the handles to make the can the shape you want. You will see that you need to do this twice.
3. On the drawing toolbar, click AutoShapes. From the choice of "Basic Shapes" choose "block arc" to place between the two can shapes.
4. You will also need to label the diagram by using the text box as used in the previous example of the triangle:

• Insert a text box where you require labels
• Format the text box to remove the line and fill colour. The text box will then become transparent.
• Change the font to Arial or some other suitable san serif font.
• Copy the textbox to the other places required. (Hold down the ctrl key and drag is probably easiest).
• Type in the labels.
• Shift select labels and diagram. Group the textboxes and diagram so that it stays in one place.
• Format the new object and choose the wrapping that you want. (MS Word defaults to the setting where the object is in front of the text).

5. You may also use the Line callout by clicking on  > AutoShapes >Callouts >Line Callout 3 as well as the curve by clicking on > AutoShapes > Lines > Curve.
6. Apart from using the above tools, you may also set the line and fill properties of objects and set the order in which objects are displayed. When the drawing is completed, all the objects have to be grouped so that it can be treated as one object. 
7. As an option you could use a caption  by clicking >Insert > Caption > Figure.

Good luck !