• In Unit 1, students learn to visualize multiples of ten and use their visualization skills to carry out mental computations.
  
• In Unit 2, students additionally learn to visualize and use multiples of five as a computational tool.
  
• Unit 3 presents a greater challenge, providing opportunities to use visualization skills to mentally and informally compute with numbers up to 1,000.

Throughout the lessons, students continue to develop group interaction skills and take responsibility for their learning and behavior.