Alberto is learning algebra. His teacher provides him with classroom instruction and exercises to work at home and also solves problems with the class. When concepts are new, the teacher interacts often with Alberto and his classmates, showing them how to perform operations, giving subtle hints, asking leading questions, and making suggestions. As Alberto becomes more competent in his new skills,
asked May 12, 2017 in Education by Susys his teacher begins to back off, allowing him to work with increasing independence. Alberto's teacher has used the constructivist principle of:.
a. scaffolding.
b. negotiated meaning.
c. situated learning.
d. multiple perspectives.

A) Scaffolding

Explanation: Scaffolding can be simply refered to as an instructional method of teaching where teachers or tutors guide their students in a step by step manner to solve a problem, the influence or involement of the tutor in the problem solving decreases or fades as the student becomes more and more competent in problem solving. This allows for the student to work independently except if the student request for the intervention of the tutor.

Alberto's teacher has used the constructive principle of scaffolding in teaching him.

"social stratification refers to the way people are ranked and ordered in society. in western societies, stratification is primarily seen and understood as a result of socioeconomic status, which produces a hierarchy in which access to resources, and possession of them, increases from the lower to the upper strata"

according to hess's theory, when the magma cooled, it would expand and push the tectonic plates apart. it would push the north and south america plates to the west and eurasia and africa ones to the east. the atlantic ocean would get wider but the coastlines of the masses would stay the same.

harry hammond hess was a geologist and a united states navy officer in the second world war. he is considered to be one of the founding fathers of the theory of plate tectonics. he is known for his theories on sea floor spreading, stating that the movement of the continents was the result of see floor spreading. the continents are attached to the plates and do not move separately. the plates themselves shift and change shape, carrying the continents along.