Python 3 Object Oriented Programming

Timekeepers穿越回1889年巴黎世界博覽會，親眼見證艾菲爾鐵塔完工！但壞蛋DeLay竟偷走藍圖，歷史面臨改寫危機！The Timekeepers is a secret organization of kids who keep the course of history on track when a villain named DeLay tries to cause chaos. When the hands on their special watches start to spin backward, the Timekeepers know that DeLay has been up to no good, and it's up to them to make things right. In this installment, the Timekeepers travel back to the 1889 World's Fair to see the unveiling of the newly built Eiffel Tower. However, things don't go as planned when they discover that the villainous DeLay is up to his old tricks and has stolen the blueprints! With a range of adventures that span all of history, The Timekeepers series is perfect for any adventure lover.

Each book in this unique Math Mastery collection developed by experts covers all the essential skills for children in the first stages of their math journey. Each topic is supported by clear examples and helpful hints to encourage proficiency.Aimed at children aged 8-9, topics include numbers, counting, addition and subtraction, time and shape, measuring, and math practice. This collection is attractively illustrated and led by appealing characters who offer helpful tips to children (and parents) that make learning accessible and interesting. Every child can learn Math with Math Mastery.

Each book in this unique Math Mastery collection developed by experts covers all the essential skills for children in the first stages of their math journey. Each topic is supported by clear examples and helpful hints to encourage proficiency.Aimed at children aged 8-9, topics include numbers, counting, addition and subtraction, time and shape, measuring, and math practice. This collection is attractively illustrated and led by appealing characters who offer helpful tips to children (and parents) that make learning accessible and interesting. Every child can learn Math with Math Mastery.

Each book in this unique Math Mastery collection developed by experts covers all the essential skills for children in the first stages of their math journey. Each topic is supported by clear examples and helpful hints to encourage proficiency.Aimed at children aged 8-9, topics include numbers, counting, addition and subtraction, time and shape, measuring, and math practice. This collection is attractively illustrated and led by appealing characters who offer helpful tips to children (and parents) that make learning accessible and interesting. Every child can learn Math with Math Mastery.

Each book in this unique Math Mastery collection developed by experts covers all the essential skills for children in the first stages of their math journey. Each topic is supported by clear examples and helpful hints to encourage proficiency.Aimed at children aged 8-9, topics include numbers, counting, addition and subtraction, time and shape, measuring, and math practice. This collection is attractively illustrated and led by appealing characters who offer helpful tips to children (and parents) that make learning accessible and interesting. Every child can learn Math with Math Mastery.

Each book in this unique Math Mastery collection developed by experts covers all the essential skills for children in the first stages of their math journey. Each topic is supported by clear examples and helpful hints to encourage proficiency.Aimed at children aged 8-9, topics include numbers, counting, addition and subtraction, time and shape, measuring, and math practice. This collection is attractively illustrated and led by appealing characters who offer helpful tips to children (and parents) that make learning accessible and interesting. Every child can learn Math with Math Mastery.