The following examples I found on the Web:
(They started in their Cafeteria and presented the process - then the visitors went out to see the individual students as they explained their projects)
HES EXPO was an Entire School EXPO led by there Resource Teachers: This is what students did while they were in their additional 90 minute resource time each week.
Each class where in charge of something different that resolved around their central theme.
They made ornaments to sell and wreaths to sell and proceeds went to Mission of Hope.
The students made all the decorations for the play and they ran their own concessions stand
One class even created cookbooks. These snowflakes showed the example of working through first through4 draft -then they took a field trip to SHS makerspace and made the snowflakes out of cardboard.
In addition they had a musical performance and play which students wrote and produced :)