Ok, here I go with my first tutorial!
Before you start, you will need the following files: Medal files
First go to GIMP and select a new image (the default size 640×400 px is Ok). Now go to File > Open as Layers and select the teacher picture (FIGURE 1).

FIGURE 1 Add the teacher picture.
Next the background… add a new layer and drag the “Film grain” pattern and drop it on the layer. Reduce the brightness of the background using Colors > Brightness/Contrast.
Now select the Ellipse tool and draw a circle (220 px) around the teacher picture (remember to press the Shift key after starting your selection to draw a perfect circle). Then select the Blend tool (gradient) and choose the Golden gradient from the gradients dialog. Drag diagonally over the selection from bottom left to top right to make the gradient. (FIGURE 2)

FIGURE 2 Use the Gradient tool to make the medal’s base.
Keep the selection active, and add a new layer above the medal’s base. Shrink the selection by 16 px (Select > Shrink). Again select the gradient tool and apply the golden gradient to the selection. Go back to the medal’s base layer and go to Color > Curves to darken it a little bit (FIGURE 3).

FIGURE 3 Don’t ask me about the teacher’s engraving… we’ll be there in a moment!
Select the top medal layer and go to Filters > Map > Bump Map. Apply the settings in the picture below: (FIGURE 4)

FIGURE 4 Applying the bump map, notice we’ve selected the teacher picture as the bump map.
Note: The bump map makes “bumps” in the active layer, as if another layer (called the bump map) was pushing up from underneath.
Hide the teacher picture layer.
For the final touches, I added a support piece for the medal’s necklace and the actual necklace is made using the Free Select tool (Lasso tool) and some straight lines with the paintbrush (FIGURE 5). You can also add a shadow using Filters > Light and Shadow > Drop Shadow.

FIGURE 5 Adding the final touches.
And that’s it! Let’s see our final result:

I hope you like it and thanks for reading