Here are some resources I found most useful as a teacher and their pricing:

Linguahouse.com - a website with a broad selection of high-quality worksheets and lesson plans with audio for levels ranging from elementary to advanced. A good solution to delegating material preparation. Several lesson plans are free. One time annual fee.

Quizlet - an online app with a broad range of exercises for vocabulary drilling. You can upload your own images and create your own vocabulary sets at a one time annual fee. The resource is free for students.

Teachers pay Teachers - an online store for worksheets. No subscription. You just buy the worksheets you choose and they're yours forever.

Twinkl - an online store for worksheets for school children. Several worksheets are free. Monthly subscription.

Super Simple - free worksheets for all phonics.

iSL Collective - a free online store for worksheets.

IELTS-up -free lessons with exercises and tests for the IELTS online

IELTS liz - a website with good explanation on how the IELTS is marked and how to score high.

Course Hero - a resource for English Literature study guide with infographics, plot summaries, character analysis, discussion questions, quotes e.t.c.

EnglishwithAl - that's where you are now!

EnglishwithAl is not sponsored by any of these resources. These are tools I personally found most useful.