Merriam Webster is a trusted dictionary and thesaurus, and this link takes you to their convenient website. The website includes definitions for English language learners and kids.
RhymeZone will tell you all the words the rhyme with any word you type in.
The Smithsonian's website of articles for kids, middle schoolers, and teens.
Practice a range of grammar topics by answering questions that get more difficult as you go. For each correct answer, ten grains of rice are donated to the World Food Programme.
This site has a vocabulary game that gets progressively more difficult. For each correct answer, ten grains of rice are donated to the World Food Programme.