Some  grammar  problems  are  apparent  and have negative effect on communication.
20 Grammar
problems interfere
with communication of the writer’s ideas. Difficult
to read sentences. 15
Severe  grammar  problem  interfere  greatly with  the  message.  Reader  can’t  understand
what the writer was trying to say. 10
Style and
quality of
expression Attempts  variety,  good  vocabulary,  not
wordy. 25
Some vocabulary misused. Maybe too wordy. 20
Poor  expression  of  ideas.  Problems  in vocabulary.
15 Inappropriate use of vocabulary. No sentence
variety. 10
Mechanic  and spelling
Correct  use of punctuation, capital  letter, and spelling.
25 Some  problems  with  punctuation  and  capital
letter. Occasional spelling errors. 20
Punctuation  errors  interfere  with  ideas. Spelling problems distract readers.
15 Severe  spelling  problems.  Errors  in  sentence
punctuation and obvious in capital missing. 10
B. Relevant Studies
Supporting the literature review above, there are some researchers who have conducted  the  similar  studies  some  years  ago.  The  first  is  Nazenin  Ruso  2007
who conducted a research under the title
The Influence of Task-based Learning on EFL  Classrooms
.  The  second  is  Etika  Putri  Istiqomah  2014  who  conducted  a research  under  the  title
Developing  English  for  Tenth  Grade  Students  of
Boga
Department at SMK 4 Yogyakarta.
The  Ruso’s  finding  states  that  task-based  learning  TBL  or  task-based language  teaching  TBLT
is  helpful  to  increase  the  students’  motivation  and learning.  TBL  or
TBLT encourages students’ practice opportunities in using the target language in the lessons as a result of presenting various tasks. In the light of
continued
students’ reflections for the tasks used during the study, which are very positive, it can  be  concluded  that  students  accept  the  idea  of  TBL  or  TBLT  while  learning
English as a second language. She also mentions that
the students’ attitudes toward TBL or TBLT are very positive.  Students  indicate  that  more  emphasis  is  shown  on  interaction  in  class.
This  interaction is  encouraged not  only individually but  also  within group work. Students also say that their teacher presented various tasks in class and they make
use of practice opportunities. Further,  Istiqomah  2014  develops  the  English  learning  materials  using
Task-based Language Teaching TBLT. She develops the English materials that match with the students’ learning needs and target needs. The materials cover the
four skills of English and it is developed well.
C. Conceptual Framework
It has been mentioned in Chapter I that vocational high school students are prepared  to  face  their  work  life.  They  are  equipped  not  only  with  the  basic
knowledge  of  their  study  programme  but  also  with  the  communication  skills  in daily life context based on the global demand.
In learning English, materials have the important role. It helps the students to  get  the  input  for  their  learning.  However,  some  problems  occur  related  to  the
English  materials  that  students  have.  One  of  them  is  the  unavailability  of  the specific English materials for the specific study programme.
As vocational high schools have different aim from other schools, they need the specific English materials which match with their study programme. Materials
are presented in the form of tasks with the clear instruction, so that it can function properly.  The  tasks  should  be  related  with  their  study  programme,  needs,  and
close to their real life situation. This kind of materials can help the vocational high school students to master their English to face their work life.
Based on the problem stated earlier and the good advantages of using tasks by  some  people  above,  the  researcher  decides  to  do  a  research  on  Developing
Task-based  English  Materials  for  the  Tenth  Graders  of  Vocational  High  School. They  are  developed  based  on  the  principle  of  effective  tasks  that  have  been
proposed by some experts such as Nunan 2004, Hutchinson and Waters 1989, Tomlinson 1998, and other experts.
If these English  materials  can be developed successfully, they  will  be very useful  for  both  students  and  teachers.  Students  can  get  enough  input  to  improve
their mastery of English skills which match with their study programme. Teachers can teach with the little preparation because the materials are ready to use.