Mr. castillo's second grade class is quite diverse, and his students represent a wide range of abilities. he believes that flexible grouping is the most effective way to differentiate and reach the most students. in order to use flexible grouping effectively and follow the recommended guidelines of expert educators, mr. castillo should do all of the following except:
a. form and re-form groups based on students' current performance in the subject.
b. use flexible grouping and group by ability for all subjects.
c. provide appropriately different instruction for the different groups.
d. discourage comparisons between groups of students

The correct answer is : B

Explanation:

Flexible grouping is a technique or method of dividing learners into groups for class activities based on specific goals and objectives as well as for learning needs and styles. With this method, teachers have a greater chance of success.  Effective small groups work together much better to cooperate and accelerate the learning process.

answer; shared meaning;

male citizens in athens could vote on all the decisions that affected the city and serve on juries. however, democracy was not open to everyone. citizen women and children were not allowed to vote. slaves and foreigners living in athens (known as metics) were banned from participating in government.