1. Review determining adjectives. Revisit that there are many types of determining adjectives, but that they all have many things in common:
a. They always possess a gender and identify a quantity.
b. They always agree with the gender and number of the noun or name that they accompany.
c. They may be placed either before or after the noun or name that they accompany.
2. Review demonstrative adjectives and possessive adjectives to ensure retention.
3. Introduce the concept of numbers as determining adjectives. Make two columns on the board labeled “cardinal" and “ordinal" (there are actually two more categories, multiples and partititives, but it may be wise to save that learning for another day because they are more complicated). Give students an example to go in each category on the board and see how many more they can write in the categories. Then have them fill in their charts on the organization sheet.
4. Create examples together on the board of sentences using both cardinal and ordinal numbers.
5. Erase the board and have students put away their organization sheets. Set out nine objects that are the same color and one object that is a different color. Line up the objects from left to right and split the class into teams. Call up one member from each team and place the different colored object in the fourth position from the left. Quickly ask the students which ordinal number describes position of the different colored object (cuarto). The student who has guessed correctly wins a point for his/her team. Switch students, reposition the object, and whoever says the correct ordinal number first gets a point.
6. If there is time, work on computers and take this quiz on using ordinal numbers. http://www.studyspanish.com/practice/ordnum.htm
For assessment, you will easily see which students understand this concept through the examples on the board and through the game. You may also ask students to print out their scores when they finish the ordinal numbers quiz.
Students should feel confident before moving on to the next determining adjective group so that they don’t get overwhelmed. As you do move on to indefinite determining adjectives, be sure to continue reviewing and clarifying any doubts students might have. This page can provide further explanations to clarify any doubts: http://www.gramaticas.net/2010/09/ejemplos-de-adjetivos-numerales.html