Key Ideas, Main Ideas, and Details Help
This link will help you find key details and meanings of words. This is usually worth about 23 questions on the ACT.
This link will help you with reading for main idea!
This link is from Method Test Prep on finding Evidence.
This link is from Method Test Prep on Theme, Tone, and Perspective.
This link is from Method Test Prep on annotating reading passages on the ACT.
This link is to study.com and includes practice on ACT tone, etc types of questions.