I am Sammy, STEM Educator. We are passionate about 3D printing. We use SelfCAD https://www.selfcad.com for teaching 3D modeling.
Check the models we have created in SelfCAD here https://www.instructables.com/member/Sammy50/instructables/. The teachers who want to teach 3D modeling or the one teaching can find them easier to follow and teach their students easily.