The purpose of this activity is for students to match numbers and groups of objects. Students find the bag that contains the given number of objects. The bags can be filled with math tools, such as connecting cubes and counters, or other small classroom objects. The number is displayed and read orally to assist students in connecting the written number to the spoken number word.

• Invite a group of students to share which bag contained 9 objects.
• “¿Cómo saben que esta bolsa de objetos va con el número 9?” // “How do you know that this bag of objects goes with the number 9?” (We counted them and there are 9.)

The purpose of this activity is for students to match numbers and groups of objects. Each group of students has a collection of 1‒10 objects in a bag labeled with a letter. They count to determine how many objects are in their bag. Students find that number on their recording sheet and write the letter that is on their bag. Then they repeat with other bags of objects. The bags can be rotated between groups or groups of students can move from one bag to the next placed at stations.

Consider establishing a noise or movement to signal to students when it is time to transition between stations. There do not need to be 10 stations.

A reference sheet is provided as a blackline master. Students will continue to use the sheets throughout the unit. Consider copying them on cardstock or laminating them to be used repeatedly.

• Invite students to share which number they marked for each station. 
• “¿Cómo descubrieron que el número 5 va con esta colección de objetos?” // “How did you figure out that the number 5 goes with this collection of objects?” (I counted them and then looked for the number 5.)

The purpose of this activity is for students to revisit Stage 1 of the Number Race center. In an earlier variation, students traced numbers. Now they write the numbers. Students practice recognizing and writing numbers as they roll a connecting cube onto the mat and write the number that it lands on. Students continue rolling and writing until one number "wins" (all of the numbers in the column are written).

After students have written all of one number, they can finish writing the rest of the numbers or play again. Students can use different colors or writing utensils during this center. Writing numbers backwards (“reversals”) and incorrectly forming numbers is expected in kindergarten. The emphasis is on students writing a number that is recognizable to others with practice.

After they participate in the Number Race center, students choose any previously introduced stage from these centers:

• Geoblocks
• Math Fingers

• “¿Cuál número les gustó más escribir? ¿Cuál número les costó más trabajo escribir? ¿Por qué?” // “Which number was your favorite to write? Which number was most challenging to write? What made it challenging?”