The purpose of this activity is for students to learn stage 2 of the Mystery Number center. Students pick 3 cards and make a mystery three-digit number. Students give clues based on the sentence starters and their partner tries to guess their number. Students should remove cards that show 10 from their deck. When they give clues and guess the number, students demonstrate understanding of the base-ten system, both the meaning of each digit in a number and the order of the numbers (MP7).

• “¿Qué tipos de pistas fueron especialmente útiles para ustedes cuando intentaban adivinar el número de su compañero?” // “What types of clues were particularly helpful to you when you were trying to guess your partner’s number?”

The purpose of this activity is for students to choose from activities that focus on addition or subtraction. Students choose from any stage of previously introduced centers.

• Jump the Line
• Mystery Number
• Number Puzzles

• “¿Qué les gustó de las actividades en las que trabajaron hoy?” // “What did you like about the activities you worked on today?”