The fun and simple problem-solving guide that took Japan by stormKen Watanabe originally wrote Problem Solving 101 for Japanese schoolchildren. His goal was to help shift the focus in Japanese education from memorization to critical thinking, by...
Price history
▲7.7%
Jan 16, 2023
€13.58
▼-13.34%
Jan 6, 2023
€12.61
▲7.15%
Nov 7, 2022
€14.55
▼-6.67%
Oct 17, 2022
€13.58
▲50.05%
Oct 2, 2022
€14.55
▼-33.36%
Sep 25, 2022
€9.69
▲15.4%
Sep 7, 2022
€14.55
▼-13.34%
Aug 18, 2022
€12.61
▲7.15%
Aug 2, 2022
€14.55
▼-6.67%
Jul 11, 2022
€13.58