JET Program: Aspiring JETs The official JET Program website
JET Program General Information Handbook, 2022
Tofugu's JET Program guide I highly recommend this guide, especially the article about the JET Application and Statement of Purpose.
JET Program Guide An unofficial guide to the JET Program.
The JET Program in Japan. Another unofficial guide to the JET Program.
Official JET Program Teaching Guide
ALTopedia A site where ALTs can find and post lesson plans, handouts, worksheets, and activities. I highly recommend this site above any other ALT resource. There’s lots of material here you can use or draw inspiration from to create your own lessons.
The Lesson Repository Lessons created by Nagano prefecture JETs.
Akita Wiki Teaching Resources Lesson plans and activities by Akita prefecture JETs.
Miyazaki Prefecture JET Teaching Materials.
Genki English Classroom lessons and activities. Mostly aimed at elementary aged students but some could be used in junior high as well.
Irasutoya An abundance of cute clip art you can use on handouts, powerpoint presentations, and worksheets. You can search in English or Japanese but I find Japanese yields better results.
IllustAC Free clipart and vectors.
Teach This ESL activities and worksheets.
Busy Teacher Free worksheets.
Read the Kanji A site that aims to increase your kanji recognition, vocabulary, and reading skills. The first level (N5) is free.
GENKI Study Resources Review site for the GENKI textbook series.
Irodori A free textbook that teaches Japanese through everyday situations you will encounter in daily life.