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김요나단
Reviews
1,803
Hello. I am Teacher Jjonni, your cube education expert! I honed my expertise in the cube while working as a manager at the Korea Cube Association. Since then, I have gained experience teaching cubes across all age groups. I worked as an after-school teacher at an elementary school, teaching not only elementary students but also middle school students during the Free Semester Program. I also taught cubes to preschoolers in one-day classes. :) Furthermore, not content with just teaching children, I have consistently participated in official competitions to improve my own skills and continue to develop further. :) A sense of accomplishment is incredibly important for children. This is because that sense of achievement leads to confidence and ultimately to a child's self-esteem! Just the fact that they accomplished something difficult—something not just anyone can do—on their own strength gives a child confidence and provides them with something to boast about to others! The versatile cube can cultivate spatial reasoning, creativity, memorization, and mathematical ability! Shall we try solving it together?
Experience & Activities
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Vice President of the Korea Cube Association
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elementary school after-school instructor
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Middle school free semester instructor
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Cube Culture Promotion Institute Regular Member
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Cube Instructor Master Certification
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International Cube Judge Certification
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Winner of the Best Instructor Award at the Student Cube Competition
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WCA Certified 3x3 Cube Best Record 12.37 Average Record 14.33
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Holders of records in other official sports
1803 Parent Reviews
김**
10years old
2026. 7. 29 PM 4:0:17
[대회 준비] <기록 단축> 333큐브 Level Up!
Up until now, my husband and I rarely helped with or closely supervised our child's Rubik's Cube practice. However, thanks to this class, our whole family has been able to spend time understanding the material and practicing together. In the process, our child has gained pride and confidence in the Rubik's Cube and is showing even more joy in taking on the challenge. To grow to the next level, I think consistent repetitive practice is necessary to internalize the formulas learned from you. We are participating in a Rubik's Cube competition this week, and I think our child will be able to confidently challenge the record they set for themselves. We are looking forward to the next class, teacher!
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현**
9years old
2026. 2. 12 PM 8:34:54
[대회 준비] <333큐브> 1분에서 40초로 Level Up!
I found and started taking classes at Kookge during the school vacation, when after-school activities aren't available. I signed up because it seemed to be about speedcubing, which helps you break records. At our first meeting, the instructor observed my child and provided guidance on what to focus on and how to improve it, and we have consistently participated for about a month following those instructions. It is impressive how the instructor assesses the children's practice progress every session and helps solve difficult problems. I also learn a lot by watching my friends play together. If you are curious about the world of speedcubing, I think starting at this level would be a great idea.
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It helped 1 people.
김**
10years old
2026. 7. 29 PM 4:1:43
[대회 준비] <기록 단축> 333큐브 Level Up!
There was a period when my child's performance stagnated. As a parent, I was very worried seeing my child become disappointed that their skills didn't seem to be improving. However, thanks to a recommendation from their after-school teacher, we discovered Kookgeu and formed a wonderful connection. While there hasn't been a noticeable improvement in scores yet, the teacher is approaching intermediate formulas much more easily through their lessons. Most importantly, instead of simply memorizing formulas from a book, the teacher personally explains case-by-case approaches and even demonstrates them, which seems to have significantly improved my child's ability to understand situations and make judgments. :)
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