I've been dabbling in Geogebra, an OER for math, and tripped over this: https://www.geogebra.org/m/zQ7ADTWX ... seems to be a *lot* of activities for making visual sense out of math for GED preparation.
I don't know who A B Crohn is -- the information at the site says retired, GED math teacher, and that s/he trains folks in geogebra and desmos... but these look useful...
Comments
https://www.geogebra.org/m/CkbnYQkU this is prob'ly a more useful link to the actual lessons...
I've poked around a bit
THere seem to be a lot of exercises that generate problems that students can check their answers to, and it goes down to lots of pretty basic stuff (like naming numbers).
This is an awesome find! Thank you! I like the interactive components and the simplicity of the presentation.