Collaborative learning tends to be most advantageous for high-ability students, whereas it is not very beneficial for low-ability students. a. true
b. false

a. true.

Explanation:

Collaborative learning refers to a variety of educational methodologies involving joint intellectual effort between students, or students and teachers. Typically, students work in groups of two or more, finding common understanding, ideas or definitions or making a product. A drawback of collective learning is that it may not consider the fact that learning levels vary among the students, and that students have different learning styles. Some students may influence the group of learners and others may not want to participate in the activities.

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.