Play games by solving problems through drawing on the screen. Choose from addition, subtraction, multiplication, and division. Select from three difficulty levels. Unlock colors as you progress. Use freeform drawing mode for creative problem-solving.
To and pronounce alphabets and numbers with interactive exercises. Trace letters in easy mode, refine precision in normal mode, or freely in freestyle with AI feedback. Take quizzes to test knowledge, view word examples, and share progress.
Enables typing and testing directly on iPhone or iPad. Supports syntax highlighting and auto-suggestions for multiple programming languages. Includes quick pop-up for operators and customizable themes for light and dark modes.
Read ebooks with auto-scrolling at adjustable speeds. Switch between day and night viewing modes. Bookmark pages to resume reading later. Adjust text size and view in full screen portrait or landscape.
SQL through 15-minute daily sessions without a laptop. Complete interactive exercises with real-world datasets. Receive instant feedback and track progress. Build skills from beginner to job-ready.
Browse scholarly journals by subject to find relevant titles. View table of contents for current and past issues. Create a personal bookshelf of favorite journals. Save articles to EndNote, Mendeley, Zotero, RefWorks, or Dropbox.
Convert PDFs, Word files, and other documents into natural-sounding audio. Listen anywhere with background playback. Adjust speed and settings. Sync documents across cloud services. Bookmark content, text, and choose from multiple voices.
Learn about networks through interactive tutorials and visualizations. Explore simplified datasets and see behavior in real time. Complete mission-based challenges to understand concepts like training, activation, and optimization.
By writing Hangul characters with guided stroke order practice. Listen to and speak phrases to improve pronunciation. Build reading, writing, and speaking skills through interactive exercises.