Work out what you're doing to make people prefer to lie to you and tell you they've understood when they clearly haven't?
If you're having the same communication problem with multiple people, then I'm afraid that's you not them.
If you're having the same communication problem with multiple people, then I'm afraid that's you not them.
Though I do get the frustration. I had similar with one of my juniors, and it took me ages to work out that his learning style didn't match with my teaching style. I ended up having to go right back to basics and walk him through everything painstakingly slowly.