Start with holling, studying math on your own without a teacher.
From video lectures to problem solving, incorrect answer learning, and learning analysis, everything is possible with one app.

Have fun studying while solving problems and collecting stars on the island.
The more questions you answer correctly, the cooler the island becomes and your ranking goes up.

*Holling is a tablet-only app that can be downloaded and used on a tablet PC.

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◼ I understand concepts I don’t know through video lectures.
If you have difficulty with a problem, listen to the video lecture. A variety of lectures are prepared for each unit, from basic concepts you need to know to explanations of representative questions.

◼ Master the unit perfectly with step-by-step learning
You can master a unit by studying according to the set structure, from concept learning to final learning. Try learning by gradually increasing the level according to the level of difficulty with the level-up challenge.

◼ Collect only unknown types and manage them effectively
You can solve types that you do not understand well in challenge learning repeatedly. Manage vulnerable areas effectively.

◼ Check your learning results with weekly learning reports
Check how much you studied last week and which sections you are good at and which you are not good at with a weekly report. You can check the changes in your skills and receive learning comments.