This is a resource site created by my old JTE. She retired but she didn't want to let her activities and plans go to waste. She also makes a portion if you use her link to buy things off amazon so she's been trying to force me to buy things using her link. Shes a really sweet lady and she put a lot of time into making this site so I hope you can use it. Show your elementary JTEs too! The site is primarily in Japanese so they would have no problems navigating the site!
https://englishactivity.net/
The resources follow the progression of the textbooks I listed in the short description. But the material is categorized so it should be easy to find an activity that you can use with little to no prep!
This is nice and helpful! Thanks to you and to your JTE!