Vocabulary foundations
Word Foundry
Twelve authored missions with explanations and a different language interaction.
12 missions · Foundation · Untimed
English
Vocabulary, sentence building, grammar, close reading, advanced editing and idioms.
6 activities · 72 guided missions · No account needed
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Sentence builder
Sentence Studio
Twelve authored missions with explanations and a different language interaction.
12 missions · Foundation · Untimed
Grammar choices
Grammar Garden
Twelve authored missions with explanations and a different language interaction.
12 missions · Developing · Untimed
Close reading
Reading Room
Twelve authored missions with explanations and a different language interaction.
12 missions · Developing · Untimed
Editing for clarity
Editor Desk
Twelve authored missions with explanations and a different language interaction.
12 missions · Stretch · Untimed
Idioms in context
Idiom Atlas
Twelve authored missions with explanations and a different language interaction.
12 missions · Stretch · Untimed
Practice, with a little more purpose.
Work without a countdown. Try the model, use a hint, then read the explanation. Checkpoints and practice records stay on your device. Teaching tools create shareable activity playlists and printable worksheets with answer keys.
These are original practice activities, not an accredited course or a secure assessment. Difficulty labels are editorial, not formal grade alignment. Science activities use explicitly simplified models. Playing requires JavaScript; this directory does not. See each activity's reference and model limits.