Code for Geniuses is a browser based learning app for practicing SQL, Excel, and Python through short, puzzle based lessons. Its learning paths use real data and are divided into modules. The SQL path covers queries on single tables, filters, sorting, aggregates, data cleaning, joins, subqueries, and window functions. Each SQL module ends with an exam and a certificate. The app includes practice challenges, interview questions, autocomplete for table and column names, and charts for query results. Learners can use five sample datasets or upload a CSV file, which is processed on their computer. Progress is tracked with experience points and a streak indicator. Lessons are designed for short, regular sessions, and the app runs in a web browser without requiring software installation on the learner’s computer.