3. An effective way to set up mixed-proficiency groups is to band the learners’ names
into, say, four proficiency clusters from high to low and then select randomly from
within each band so that groups will involve learners with a range of proficiencies.
Other criteria, such as sex, race, and diligence, can be considered when deciding
whom to choose from which band.
4. Random grouping is quick and easy and conveys the idea that one can work with
anyone