作者:Sean Foster

新资源

• Nikmati Keunggulan Di Bandar Judi Terpercaya
• Multiplying 2-Digit x 2-Digit Numbers Using an Area Model (2)
• Positive and Negative Space
• အခြေခံ data အခေါ်အဝေါ်များ
• quarter of tetrahedron

发现资源

• rotating_text
• Three Means
• How many SSA triangles?
• A pattern of Cuisenaire Rods, adapted from Duane Habecker's app
• Differentiation First Princ
• Picture For Vertical Angles

发现主题

• 等边三角形
• 减法
• 平面图形
• 垂心
• 任意四边形