meet  the  objectives.  Good  students  think  about  what  they  have  already  known about  the  task  and  the  related  topic.  After  that,  according  to  on  the  information,
they predict what they need to do. Second,  after  the  students  prepare  an  approach,  they  monitor  to  measure
their  effectiveness  while  working  on  the  task.  This  activity  is  defined  as monitoring process. A thermostat is used to represent the monitoring process since
it symbolizes two components of monitoring. First, the students monitor how they are  doing  as  they  work.  Second,  they  monitor  by  making  adjustments.  They
should  think  about  where  their  focus  of  concentration  needs  to  be  at  any  given time  and  consciously  focus  their  attention  on  a  specific  aspect  of  the  task  while
they  are  monitoring.  They  monitor  their  comprehension  and  production  through thinking whether they are comprehending when reading and listening or whether
they are making sense when writing and speaking. Third,  the  students  choose  a  strategy  of  problem-solving  process  when
they  get  difficulty  in  doing  a  task.  For  example,  according  to  all  available information  they  have,  they  make  an  educated  guess  if  they  do  not  know  the
meaning of a word. Similarity, the students think of another way to say something they  are  not  sure  how  to  say  it  correctly.  To  solve  these  problems,  they  use  any
resource available to them, which can come from themselves, reference materials and  other  students.  In  this  problem-solving  process,  the  strategies  vary  from
solving  problems  autonomously  by  making  a  guess  according  to  the  context  as information obtained in a dictionary. Successful students are they who are active
and appropriate in engaging in problem solving. PLAGIAT MERUPAKAN TINDAKAN TIDAK TERPUJI
Fourth, in the evaluating process, the students reflect on how well it goes after they complete all tasks. In order to find out whether they carry out their plans
and  check  how  well  strategies  have  helped  them,  the students  do  the  evaluating process.  Assessing  whether  they  meet  their  goals  of  the  tasks,  why  they  do  not
meet the  goals if they  do not and  what they  can do next time is mostly  done by strategic  students.  In  this  process,  they  evaluate  the  correctness  of  their
predictions and guesses. They think about how they can learn to make everything better  next  time  if  the  predictions  and  guesses  are unacceptable.  The  evaluating
process  is  essential  for  the  students  in  learning  from  it  in  spite  of  positive  or negative.  The  function  doing  this  process  is  that  the  students  are  able  to  make
improvements on the next tasks. It means that metacognitive learning strategy is the strategies that students
use  which  involve  planning  their  own  learning,  monitoring  while  learning,  and evaluating  the  learning  activity.  This  strategy  offers  the  ways  that  the  students
direct their own learning process and control the process until evaluate it. It helps them to manage their learning successfully.
2.1.3 The Nature of Vocabulary
In  this  part,  supporting  theories  are  provided  in  several  divisions.  This section  is  aimed  to  support  the  theories  of  vocabulary.  The  elements  are
definitions  of a  word,  vocabulary  knowledge,  vocabulary  mastery,  and  the function of  vocabulary in  reading  comprehension.  Those  are  clearly  seen  in  the
following explanations. Vocabulary  can  be  used  to  measure  how  far  students’  knowledge.
According  to  Fitriana et  al. 2011,  vocabulary  is  defined  as  the  known  words PLAGIAT MERUPAKAN TINDAKAN TIDAK TERPUJI
which are used by students.  It can be a list or collection of words and phrases. It is  usually  alphabetically  arranged  and  explained,    a  list  or  term  collection,  code
available  for  use,  a    sum    of    word    that  is  employed    by    a    language    group, individual  and  in  a  field  knowledge.  According  to  Nation   Newton  1997,
vocabulary  is  considered  as  the  knowledge  of  words  and  word  meanings. Furthermore, Lehr, Jean, and Hiebert 2001 define vocabulary as
“knowledge of words  and  word  meanings  in  both  oral  and  print  language  andin  productive  and
receptive forms. “Based  on the  explanations above,  it  can  be  inferred  that
vocabulary deals greatly with words.
2.1.3.1 Definitions of a word
Words  can  be  defined  as  the  basic  building  blocks  of  language.  Those refer  to  the  units  of  meaning  from  which  larger  structures  such  as  sentences,
paragraphs  and  whole  texts  Read,  2000. According  to Daller, Milton, and Treffers-Daller  2007:2,
“According  to  context  and  need,  researchers  can consider  types,  tokens,  running  words,  lemmas,  and  word  families  as  words.”
Words  are defined  by  making  some  basic  distinctions  as  its  basic  points. One  is the distinction between token and types. The distinction refers to any count of the
words  in  a  text.  Token  can  be  defined  as  individual words  that occur  more  than once in the text and are counted each time they are used. It is added by Daller et
al. 2007:2 ,  they  state  “Tokens  refers  to  the  total  number  of  words  in  a  text  or
corpus.” However, the number of types is the total number of the different word form.  Therefore,  a word,  which  is repeated  many  times, is  counted  only  once
Read,  2000:18. According  to  Daller  et al. 2007:2 ,  “types  refer  to  the  total
number of different words.” PLAGIAT MERUPAKAN TINDAKAN TIDAK TERPUJI
The  other  distinction  is  between  function  word  and  content  words. Function  words  include  kind  of  words  such  as  articles,  prepositions,  pronouns,
conjunctions, auxiliaries, and others. These words are seen as belonging more to the grammar of the language than to its vocabulary. Different from content words,
which include nouns, ‘full’ verbs, adjectives, and adverbs, they have little if any
meaning in isolation and serve more to provide links within sentences, modify the meaning of content words and so on. The content words come in various forms.
For  example,  the  word  “wait”  may  become  as waits,  waited, and waiting.  The words would normally regard as the same word in different forms. The forms are
as the results of inflectional endings adding to a base form without changing the meaning or the word class of the base. The base and inflected forms of a word are
known as lemma. It is supported by Daller et al. 2007:3, they state “A collection
of  words  such  as work,  works,  working worked,  comprising  a  root  form  and  the most frequent regular inflections, is known as a lemma.” The base forms have a
variety of derived forms that often change the word class and add a new element of meaning.  For example, the word bright: brightly, brightness, andbrighter. All
of these words closely correlated in form and meaning. Such a set of word forms, sharing a common meaning, is known as a word family. According to Daller et
al. 2007:4, they say “closely related words would be called a word family.”
2.1.4 Vocabulary Knowledge
Knowing a word means being able to recognize it when it is heard or when it is seen and to distinguish it from words with a similar form, being able to judge
if the word sounds right or looks right. Besides, it means having an expectation of what grammatical pattern the word will occur in, having some expectation of the
words  it  collocates  with,  and  being  able  to  recall  its  meaning  when  it  is  met Nation,  1990:31.  According  to  Thonburry,  2002:130,  knowing  a  word  means
knowing  the  word’s  form  spoken  and  written,  the  word’s  meaning,  any connotations  the  word  might  have.  In  addition,  it  means  knowing  whether  the
word  is  specific  to  a  certain  register  or  style,  the  word’s  grammatical characteristics  for  example  part  of  speech,  the  word’s  common  collocation,  the
word’s derivation and the word’s relative frequency. The  assumption  of  word  knowledge  can  be  seen  from  Nation  1990:31.
He  added  receptive  and  productive  knowledge  and  several  considerations  and reorganized them. The assumption is seen in the following Figure.
Figure 2.2 Components of Word Knowledge Nation, 1990:31 The  figure  above  shows  further  distinctions  of  receptive  and  productive
word  knowledge.  The  distinctions  explain  the  words  students  obtain  both  from reading  and  from  listening  to  communication.  Furthermore,  those  distinctions
enlighten the words they can identify in mind when they want to speak and write
R: Receptive; P: Productive
in  a  foreign  language.  The  word  knowledge  is  necessary  for  their  process  of learning the foreign language.
2.1.4.1 Receptive and productive vocabulary knowledge
The  other  ideas  on  the  vocabulary  knowledge are  proposed.  First,  it involves  receptive  and  productive  knowledge.  Second,  it  consists  of active  and
passive  vocabulary  knowledge.  These  aspects  are  crucial  to  support  vocabulary knowledge.
Receptive and  productive  knowledge are  the factors,  which can  affect students’ mastery of vocabulary. Students need to consider these factors in order
to  recognize  vocabulary. Accordiong  to  Nation  1990,  the  receptive  knowledge refers  to  listening  and  reading,  while  productive  refers  to  all  four  English  skills
such as listening, speaking, reading, and writing. The receptive knowledge is obtained by recognizing a word when students
hear  and  see.  This  is  mostly  mentioned  as  their  listening  and  reading  activities. This  knowledge  involves  being  able  to  differentiate  the  words  with  its  similar
forms and being able to  judge the right sounds. The receptive knowledge has an expectation  of  the  grammatical pattern,  which takes  place. The  productive
knowledge  involves  activities  of  listening,  speaking, reading, and  writing.  It consists  of  how  to  pronounce  a  word,  how  to  write  and  spell  it,  how  to  use  it
correctly  based  on  grammatical  patterns.  In  the  low-frequency  word,  the productive knowledge does not require to use a word too often rather than use it in
appropriate situations Nation, 1990. In  addition,  vocabulary  is  classified  into  active  and  passive  vocabulary
knowledge. Active vocabulary knowledge is defined as the items, which are used PLAGIAT MERUPAKAN TINDAKAN TIDAK TERPUJI