My desk neighbour Ellie was writing on her hands yesterday. I asked her why and she showed me…
If your students leave out a 3rd person s, show them the S hand. If they leave off an -ing ending, show them the other.
Two very common errors that can become fossilized very easily. Maybe a fun and visual approach like this might be better than verbal or written correction.
Simple as that.
Let’s see if it works.