**You can teach him while using your own right hand.** He needs to see how a shape or letter is made; he doesn’t need to copy which hand you use.

At three, keep the emphasis on enjoyable drawing, scribbling, and simple shapes rather than neat handwriting. These activities develop the control he will later use for letters. Play dough, painting, and building with blocks also help develop hand skills. [American Academy of Pediatrics guidance](https://www.healthychildren.org/English/ages-stages/preschool/Pages/hand-and-finger-skills-of-your-preschooler.aspx)

A practical approach is:

- **Sit beside him, facing the same direction.** Draw a large, simple shape on your own paper, slowly describing the movement: “Start here, go down, then across.” Let him try on his paper with whichever hand he chooses. This gives him the same view of the shape you have.
- **Start with something he enjoys.** Draw roads, circles for wheels, or lines for rain. When he becomes interested in letters, demonstrate one at a time using the same approach.
- **Keep examples visible.** Put the shape or letter above his drawing space or to its right, where his left hand won’t cover it. NHS occupational therapy guidance specifically recommends placing copying examples on the right for left-handed children. [Left-handed writing advice](https://bridgewater.nhs.uk/wp-content/uploads/2021/12/Warrington-Childrens-Occupational-Therapy-Writing-Advice-for-Left-Handed-Children-advice-sheet.pdf)
- **Help him position the paper comfortably.** Try placing it slightly to his left and rotating it a little clockwise, with his right hand holding it steady. Adjust it so he can see what he is drawing without twisting his wrist. [NHS handwriting guidance](https://www.berkshirehealthcare.nhs.uk/advice/fine-motor-skills/handwriting)

Let him choose his hand rather than asking him to switch to the right. NHS guidance explicitly advises allowing a child’s left-hand preference. [Getting ready to write](https://www.cambspborochildrenshealth.nhs.uk/child-development-and-growing-up/hand-skills/getting-ready-to-write/)

Your role is to show the movement, make the activity inviting, and help him get comfortable. You don’t need to become proficient at left-handed writing yourself.