Gears, pulleys and levers
Aah! It’s time for me to teach the Year 5s forces again and, try as I might, my subject knowledge is really letting me down delivering any high quality lessons on using gears, making pulleys etc. (The rest of the topic area - eg friction/air resistance etc - no issue)
I have a box of random Knex that I’m not that sure what to do with, - I tried and failed to make a pulley with my own child, using it, I have watched and shown BBC classroom clips on this area but that is not very practical or hands on...although useful in their own right.
For the past two times I’ve taught this topic, I have had the children make mini seesaws using rulers and rubbers, or their glue sticks and investigating how many counters each end can hold when you move the centre of balance, and one year they made rudimentary catapults that launched marshmallows onto a target, to demonstrate transfer of force, but I’ve got next to nothing on cogs/gears and get myself into a muddle with any technical vocab.
Any help/ideas/training that could be signposted would be greatly appreciated!