Right, I'm thinking the first chapter will have to teach numbers, logical connectors and a basic English vocabulary. Additional vocabulary can be added throughout the book. We'll just have to hope that the reader can understand more or less universal symbols like arrows to point directions, circles to indicate groupings, proximity indicates labels etc. Also, a section on anatomy will be less helpful the more they've mutated.

I think arithmetic can probably be taught with reference to dots. So:

"* * * *" = * * * *

"* * * *"= 4

"* * + * *" = 4 etc.

Geometry shouldn't be a problem either. The whole thing would have to be heavily illustrated anyway.

Maybe the first couple pages should just depict really happy people using technology paired with stone agers looking miserable.