I can imagine what fun you had Myrtle. We used to turn a bench upside down and get the teachers to walk along the upside down bench with glasses or a pair of binoculars so they couldn't judge the end of the bench so they had some inclination of what it was like for the children who had no idea of their position in space.
We'd also get them to copy some symmetrical shapes with the use of mirrors. The look of perplexity on their face when their brain was telling them one thing but they needed to go the opposite way to what their natural inclination was could crease you up sometimes.
My son was once punished and kept in at playtime for walking into a table and knocking a jigsaw onto the floor. After the teacher went on one of the Dyspraxia courses she actually apologised. Bit late in the day but good that they might stop and think in future. My son who has double vision, hypermobility, dyspraxia and many other conditions was accused of deliberately walking into things. So annoying. He was SEN 5 and had a statement which included someone to dress him and undress him amongst other things and the teacher had told me that they didn't have time for the staff member who was employed soley to support my son to help my son if he couldn't be bothered to learn how to put his shoes on the right feet etc. It was a complete revelation when this member of staff attended the course at the teacher training centre. I asked the staff on duty as I wasn't there at the time to make sure they took a little extra time with the staff from my son's school.