3．
The Los Angeles Unified School District（LAUSD）has made a big chance for the 2011-2012school year．Starting July 1，homework will count for only 10% of a student's grade．The district，the second largest in the nation，says its new policy will provide a fairer assessment（评定）of students'homework and achievement．
The district hopes that the limit on homework will allow students to spend less time on large amounts of homework and more time on hobbies．The policy states，"By limiting（限制）the weight of homework toward a student's grade，a truer picture of the student's knowledge will be allowed in the achievement grade．"The new policy doesn't throw out homework．It states that homework is a chance for students to practice their skills and a tool for students to prepare for upcoming lessons．
Exactly how much time kids should spend on homework is a topic for debate．Harris Cooper，a professor at a university，says that the appropriate amount of homework time is ten minutes per day multiplied by（乘以）the student's grade．This means a third grader should spend 30minutes per day on homework．And a sixth grader would spend 60minutes．"Good homework assignments in the proper amount will have an positive effect，which helps kids perform better on tests and in school"he said．
Critics（批评者）of the new L．A district policy say that homework is an important part of learning．They fear that many kids just won't put in the effort if homework doesn't count toward their grade．
52．Starting July 1，A will count for only 10% of a student's grade in LAUSD．
A．homework
B．tests
C．assessments
53．Starting July 1，LAUSD will ask students to spendB time on their homework．
A．more
B．less
C．the same
54．If you were a 9th grader in LAUSD，you should spendC minutes per day on homework
A.30
B.60
C.90
55．The underlined word"positive"in Paragraph 3means"A"．
A．good
B．bad
C．balanced
56．Critics fear that many kids won'tCunless they have enough homework．
A．perform better
B．have fun
C．work hard．
