Super Vocabulary Builder

A vocabulary builder for kids. The app will make it easy to build up a kid's vocabulary. It will also make it easy for the parent to check how many words a kid has mastered.
It has a preset of 6000 most frequently used english words. The user can easily extend the word set.
The user can create multiple worksets. By using worksets, the seemingly impossible job will become easy and fun. The user can easily control and check the pace.
For each word, the user can record the pronunciation, use images or photos to represent the word, or use the word in a sentence. The user can also mark a word mastered or not mastered. The app will use different colors for mastered and not mastered words.