pair work

pair work
pair work

Pair work

What and Why?

Pair work involves students working in pairs simultaneously. The reasons for the use of pair work are similar to those

of groupwork. Pair work allows more students to get more practice. It also provides a change of pace to a lesson and helps to sustain motivation. Students working in pairs are able to share ideas and help each other. However, pair work can fail if it is not set up well. This can led to students getting distracted, disenchanted with English, and, eventually, misbehaving.

Practical ideas

· Ensure that students know exactly what they have to do before they begin any pair work activity. Run through a few examples with the whole class. Initially at least, pair work tasks need to have a clear, concrete focus, for example on completing an exercise, doing patterned practice, preparing some interactive writing, preparing questions and so on.

· For variety, different students can be paired together. Students can be moved around the room or they can be put into pairs with students to their left or right, in front or behind.

· Give the students a time limit so that they know when they have to finish.

· Students can work in pairs to produce questions exercises, etc. for other pairs to do.

· If the task does not actually require pair work, the students can choose whether they want to work in pairs or alone. Group work

What and why?

Group work in CES is based on the idea that students can learn language and information from each other. The principle of co-operative learning is basic to classroom education. It also allows teachers the opportunity to help with individual problems, stronger and weak students to work at the own pace (see monitoring and guiding) and more students to get more practice.

Practical ideas

· Before students begin group work, make sure they know exactly what they are expected to do. Make the focus clear with a definite outcome (for example, to write something, make a list of something).

· During the lesson note which students are working together so that you can encourage them to work with different people next time.

· After working in groups, students can be cross-grouped. This involves groups re-forming with represent of the other groups (for example, if students are labelled A,B, C, and D in their groups, cross-groups can be formed by all the As coming together, all the Bs, all the Cs and so on). In their cross groups, students can compare ideas.

· Three or four are probably the best numbers for group work.

· There are many ways to set up groups. Try to vary the basis on which you group students 1) Students can choose who to work with. 2) They can turn round and work with the students behind/in front of /next to them. 3) They can be grouped according to ability. 4) They can be grouped alphabetically, according to birth months. 5) They be can grouped to maintain a balance of boys and girls. 6) They can grouped by numbering students 1, 2, 3, 4 around the class. 7) You can cut up some postcards and distribute the pieces round the class. Students have to find who has the pieces which goes with theirs and thus form a group. 8) You can

give out cards with names of animals (4 of each). Students have to walk around the class making the noise of the animal to find out who is in their group.

Researching the Classroom

· Vary the way in which you set up groups (see above). Monitor how the students work when they are grouped differently.

· If group work is not functioning well, ask the students to draw up their on 'Rules for Group work' which they will agree to follow.

· Monitor the type of tasks which you give students in groups. Which kind of tasks produces most interaction? Do closed or open-ended tasks produce more discussion?

· Keep a record of how the students appeared to work in their groups - well, cooperatively, noisily, unfocussed and so on. Also keep a record of the details of the group work: who was working with whom, what they were doing in groups, what time of day it was, when in the lesson they did it, what preceded the group work and so on. After a few lessons, you may be able to see a pattern in what affects their group work.

· Studies have shown that the way students are labelled can affect how they perform. For example, students labelled

'good students' tend to work hard, students labelled 'weak' tend to find their work difficult. (This is known as 'the

self-fulfilling prophecy'.) You can give each group a name which flatters them, to see if this affects the way they work. For example, 'Brilliant Students: red group', 'Brilliant Students: green group', and so on.

· If you put students into ability groups, tell the weakest students that they will find the work you give them very easy for them. You can see if this increases their confidence in their work.

Homework

What and why?

In CES, homework gives students time to absorb, process and practice what they have learnt at school. (See also 'Notes on the Workbook', in the Teacher's Book.) It also keeps the students involved between lessons and maintains their commitment to learning English. In most courses, the amount of time available in class is simply not sufficient for language learning to take place fast enough. Extra work

outside class is essential.

Practical Ideas

· Before you set homework make sure that the students know which exercises they have to do and how long they are expected to spend on their homework. (No more than half an hour is recommended.)

· There are no answers in the Students Workbook so their homework will have to be checked in the next lesson. You will need to allow some time for this and to build it in as part of the lesson.

· There are a number of ways in which you can correct homework. See 'Notes on using the Workbook'.

· If you set homework, but find that students do not do it, you need to consider why this is happening. There may be a number of possible reasons. It may be too difficult or too easy. They may not have time because of other commitments. They may not see the point of it. They may not have the book (!) They may have other personal problems. You may be able to resolve these problems talking to the students about it, agreeing with them when they can do their homework, discussing whether they find it too easy/difficult, and so on. Perhaps they can sometimes suggest something to

do for homework. (Everybody doesn't always have to do the same thing.)

Researching the Classroom

· Talk to the students about homework, what they think about it and why it is necessary. Ask them what kinds of homework they find most enjoyable. Ask for ideas of what they would like to do for homework.

· You could also find out what they students think by giving them a questionnaire or by interviewing a few students.

· Experiment with different kinds of homework to see if it affects their response: homework that requires research, homework that requires to find/make things, homework exercises, homework they can record on cassette and so on. Many teachers have found that students respond better to homework that is social (i.e. that involves them interacting with other people) rather than solitary.

· Experiment with how homework is organised. For example, you could give students a list of things for homework from which they choose. You could sometimes ask them to tell you what they are going to do for homework and get them to put it in writing.

· You could involve the students in monitoring their own homework: what they did, when they did it, where they did it, what they found difficult and how well they performed. You can then see in what circumstances they appear to do best.

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best. 首先,团队合作是非常重要的。你一定会失败的如果你只靠自己的话。所以五个成员必须一起参与、组织好。其次,你应该有目标。为了达到这个目的,你应该尽你最大的努力。 Last,never give up whatever have if you get low scores,you shouldn't give there is a will,there is a there is a will ,there is also a you can make failure into yourself and believe your are the best one. 最后,无论发生什么事情永不放弃。即使你得到较低的分数,你也不应该放弃。有志者事竟成。如果有志着,也会有机会。你可以把失败变成成功。相信你自己,相信你的团队。你是最好的。

1teamwork

Teamwork Teamwork is just as important in science as it is on the playing field or in the gym. Scientific investigations are almost always carried out by teams of people working together. Ideas are shared, experiments are designed,data are analyzed, and results are evaluated and shared with other investigators. Group work is necessary, and is usually more productive than working alone. Several times throughout the year you may be asked to work with one or more of your classmates. Whatever the task your group is assigned, a few rules need to be followed to ensure a productive and successful experience. What comes first is to keep an open mind, because everyone's ideas deserve consideration and each group member can make his or her own contribution. Secondly, it makes a job easier to divide the group task among all group members. Thirdly, always worktogether, take turns, and encourage each other by listening, clarifying, and trusting one another. Mutual support and trust often make a great difference. Useful words and expressions: playing field n. 运动场 productive adj. 多产的,有生产价值的 productive force 生产力 productive labor 有价值的劳动 a productive farm 肥沃的农场 a productive writer 多产作家 investigation n. 调查,研究 (be) under investigation 在调查研究中 bear investigation 经得起考查,不怕追查 keep an open mind 不抱成见,抱着虚心态度 make a great difference 有很大差别,有很大影响

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VMWare 三种工作模式(bridged、host-only、NAT) VMWare提供了三种工作模式,它们是bridged(桥接模式)、NAT(网络地址转换模式)和host-only(主机模式)。要想在网络管理和维护中合理应用它们,你就应该先了解一下这三种工作模式。 1.bridged(桥接模式) 在这种模式下,VMWare虚拟出来的操作系统就像是局域网中的一台独立的主机,它可以访问网内任何一台机器。在桥接模式下,你需要手工为虚拟系统配置 IP地址、子网掩码,而且还要和宿主机器处于同一网段,这样虚拟系统才能和宿主机器进行通信。同时,由于这个虚拟系统是局域网中的一个独立的主机系统,那么就可以手工配置它的TCP/IP配置信息,以实现通过局域网的网关或路由器访问互联网。 使用桥接模式的虚拟系统和宿主机器的关系,就像连接在同一个Hub上的两台电脑。想让它们相互通讯,你就需要为虚拟系统配置IP地址和子网掩码,否则就无法通信。 如果你想利用VMWare在局域网内新建一个虚拟服务器,为局域网用户提供网络服务,就应该选择桥接模式。 bridge: 这种方式最简单,直接将虚拟网卡桥接到一个物理网卡上面,和linux下一个网卡绑定两个不同地址类似,实际上是将网卡设置为混杂模式,从而达到侦听多个IP的能力。 在此种模式下,虚拟机内部的网卡(例如linux下的eth0)直接连到了物理网卡所在的网络上,可以想象为虚拟机和host机处于对等的地位,在网络关系上是平等的,没有谁在谁后面的问题。 使用这种方式很简单,前提是你可以得到1个以上的地址。对于想进行种种网络实验的朋友不太适合,因为你无法对虚拟机的网络进行控制,它直接出去了。 2.NAT(网络地址转换模式) 使用NAT模式,就是让虚拟系统借助NAT(网络地址转换)功能,通过宿主机器所在的网络来访问公网。也就是说,使用NAT模式可以实现在虚拟系统里访问互联网。NAT模式下的虚拟系统的TCP/IP配置信息是由VMnet8(NAT)虚拟网络的DHCP服务器提供的,无法进行手工修改,因此虚拟系统也就无法和本局域网中的其他真实主机进行通讯。采用NAT模式最大的优势是虚拟系统接入互联网非常简单,你不需要进行任何其他的配置,只需要宿主机器能访问互联网即可。 这种方式也可以实现Host OS与Guest OS的双向访问。但网络内其他机器不能访问Guest OS,Guest OS可通过Host OS用NAT协议访问网络内其他机器。NAT方式的IP地址配置方法是由VMware的虚拟DHCP服务器中分配一个IP ,在这个IP地址中已经设置好路由,就是指向192.168.138.1的。 如果你想利用VMWare安装一个新的虚拟系统,在虚拟系统中不用进行任何手工配置就能直接访问互联网,建议你采用NAT模式。

八大浪费定义

八大浪费是定义工厂在JIT生产方式中的,其浪费的含义与社会上通常所说的浪费有所区别。对于JIT 来讲,凡是超出增加产品价值所必需的绝对最少的物料、设备、人力、场地和时间的部分都是浪费。因此,JIT生产方式所讲的工厂的浪费归纳为八大种,分别是:不良、修理的浪费,过分加工的浪费,动作的浪费,搬运的浪费,库存的浪费,制造过多过早的浪费,等待的浪费和管理的浪费,简称为八大浪费。 2具体表现 1.不良、修理的浪费 所谓不良、修理的浪费,指的是由于工厂内出现不良品,需要进行处置的时间、人力、物力上的浪费,以及由此造成的相关损失。这类浪费具体包括:材料的损失、不良品变成废品;设备、人员和工时的损失; 额外的修复、鉴别、追加检查的损失;有时需要降价处理产品,或者由于耽误出货而导致工厂信誉的下降。 2.加工的浪费 加工的浪费也叫过分加工的浪费,主要包含两层含义:第一是多余的加工和过分精确的加工,例如实际加工精度过高造成资源浪费;第二是需要多余的作业时间和辅助设备,还要增加生产用电、气压、油等能源的浪费,另外还增加了管理的工时。 3.动作的浪费 动作的浪费现象在很多企业的生产线中都存在,常见的动作浪费主要有以下12种:两手空闲、单手空闲、作业动作突然停止、作业动作过大、左右手交换、步行过多、转身的角度太大,移动中变换“状态”、不明技巧、伸背动作、弯腰动作以及重复动作和不必要的动作等,这些动作的浪费造成了时间和体力上的不必要消耗。 4.搬运的浪费 从JIT的角度来看,搬运是一种不产生附加价值的动作,而不产生价值的工作都属于浪费。搬运的浪费具体表现为放置、堆积、移动、整列等动作浪费,由此而带来物品移动所需空间的浪费、时间的浪费和人力工具的占用等不良后果。 国内目前有不少企业管理者认为搬运是必要的,不是浪费。因此,很多人对搬运浪费视而不见,更谈不上去消灭它。也有一些企业利用传送带或机器搬运的方式来减少人工搬运,这种做法是花大钱来减少工人体力的消耗,实际上并没有排除搬运本身的浪费。 5.库存的浪费 按照过去的管理理念,人们认为库存虽然是不好的东西,但却是必要的。JIT的观点认为,库存是没有必要的,甚至认为库存是万恶之源。如图1-1,由于库存很多,将故障、不良品、缺勤、点点停、计划有误、调整时间过长、品质不一致、能力不平衡等问题全部掩盖住了。 例如,有些企业生产线出现故障,造成停机、停线,但由于有库存而不至于断货,这样就将故障造成停机、停线的问题掩盖住了,耽误了故障的排除。如果降低库存,就能将上述问题彻底暴露于水平面,进而能够逐步地解决这些库存浪费.。 6.制造过多过早的浪费 制造过多或过早,提前用掉了生产费用,不但没有好处,还隐藏了由于等待所带来的浪费,失去了持续改善的机会。有些企业由于生产能力比较强大,为了不浪费生产能力而不中断生产,增加了在制品,使得制品周期变短、空间变大,还增加了搬运、堆积的浪费。此外,制造过多或过早,会带来庞大的库存量,利息负担增加,不可避免地增加了贬值的风险。 7.等待的浪费 由于生产原料供应中断、作业不平衡和生产计划安排不当等原因造成的无事可做的等待,被称为等待的浪费。生产线上不同品种之间的切换,如果准备工作不够充分,势必造成等待的浪费;每天的工作量变动幅度过大,有时很忙,有时造成人员、设备闲置不用;上游的工序出现问题,导致下游工序无事可做。此外,生产线劳逸不均等现象的存在,也是造成等待浪费重要原因。

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