In my opinion, this step is pretty easy to forget and is probably the least fun / most challenging part of the process.

The link above contains a thorough step-by-step tutorial about how to do this.

Edit the paths and convert all line segments into straight line segments (adding additional vertices if you need to smooth out curves).

Either trace the design manually using only straight line segments, or use the Path > Trace Bitmap tool to create a complete path from your image.

OPTIONAL: It is also possible to physically draw a design on paper and scan it as a high-resolution image into your machine.

Draw your design using straight lines wherever possible.

Maybe even reward students who can make creative use of small plates.

Even though it’s possible to print plates as large as the build platform of the Replicator, I highly recommend limiting the size to no more than 120x120mm.Make sure to select “mm” as the unit from the drop down before editing the numbers.

Set up the document size (File > Document Properties) to match the physical dimensions of the plate you want to make.Everything that I will explain below is taken from:

Inkscape logo 3d printing