These are really great. I just took an AP refresher class and the instructor actually had is create 3 Citrisolv collages. We used magazines (National Geographic work best) and photos, acrylic and oil pastel.
Interesting. Tell him to look at American pop artist Rosenquist, his little collages were the base for his huge paintings. These are great though.
Also Sean Hillen would be good to look up for political collage.
Perfect timing to incorporate political/propaganda pieces too. Conceptually done right those could be a homerun. Love 2D because it includes graphic design and photography as well. Maybe even take a look at graffiti back in 1960s and earlier for more of the “social issues” work. Banksy has a very sarcastic tone with those types of things. He seems to be doing things in the Bauhaus Propaganda style. Those are good to look into too.