You need to consider the format of your display board and what works best for your product / design work. 

You can choose from the following sizes:

594mm x 841mm (A1) 

594 x 841 (A1) x2 - combining two boards vertically gives you more 'room' to display more of your work and greater detail

1600mm x 600mm (Roll Pop up banner) - the largest vertical display 

You should notice from all of the examples that they have named the product. Give your product a name that helps to describe it and what it does or even create a company and give your product a name. 

Think of companies that you know of and the name of their products: Sony 'Playstation', Sony 'Walkman', Dyson 'Airblade', Ford 'Ranger', Apple 'iMac'. Some companies instead give the product a code: Dyson 'dc15'; Braun 'mdv17c' etc. 

Much of what you might wish to present may be created through setting up 'Virtual scenarios / scenes' to give your product context. You can use Onshape to set up additional objects to create your scene that can be rendered.

You can render your product and the scene using Shapr3D, Cadmio (on the school iPads) or Keyshot (this is a licensed software so would cost) or you could even use an AI softwatre such as Dreamstudio, Newarc, or Hypersketch (there are others). You can add your scene / images to these AI modeling software and along with prompts you can then render to match the prompt.