キーワードを検索して，コピペしてみました。
Mindset
これについては，MINDSET にて，この本に書かれているレベルのことはすべてわかりますわ。
Silent period
これについては，British CouncilのTeachingEnglsihから，
The silent period hypothesis is the idea that when a language is learned,
there should be a period in which the learner is not expected to actively
produce any language.
This is based on observations of a listening period in infants
when they learn a first language.
Example
When learners begin to study a new language, they can go through
a silent period where they are exposed to sufficient comprehensible input
to allow them to begin to acquire language.
In the classroom
Common classroom techniques can address the needs of learners
in a silent period, e.g. listening comprehension and vocabulary input.
There are also methodologies which explicitly incorporate a silent period,
such as Total Physical Response and the Natural Approach.
同様に，Comprehensible inputについても，
Comprehensible input is language input that can be understood by listeners
despite them not understanding all the words and structures in it.
It is described as one level above that of the learners
if it can only just be understood.
According to Krashen's theory of language acquisition,
giving learners this kind of input helps them acquire language naturally,
rather than learn it consciously.
Example
The teacher selects a reading text for upper-intermediate level learners
that is from a lower advanced level course book.
Based on what the teacher knows about the learners, the teacher believes
that this will give them 'comprehensible input' to help them acquire more language.
In the classroom
Trying to understand language slightly above their level encourages learners
to use natural learning strategies such as guessing words from context and
inferring meaning.
As the example suggests, a teacher needs to know the level of the learners
very well in order to select comprehensible input, and in a large class of
mixed ability, different learners will need different texts.
にゃもし
