Acquisition of Manipulative Skills in Chemistry

Acquisition of Manipulative Skills in Chemistry Practical or hands-on activity is an essential instrument of assessment in an active science teaching and learning process. Science practical is a hands-on activity where the students are given the opportunity to practice what they have learned in the theories of science. It is an instrument for the students to acquire Science Process Skills (SPS) and Manipulative Skills (MS). Through practical activities a student’s Science Process Skills, Manipulative Skills as well as critical thinking and learning are developed. Also, science practical is a student centered and active learning process, which prepares a student to learn how to think, analyse, solve problems and produce appropriate solutions to it. This science practical is said to be a Problem-Based Learning (PBL) Model. To identify and evaluate the level of the acquisition of SPS and MS, an assessment should be conducted on students. Assessments are important means of gaining dynamic picture of students academic developme nt. As an instrument of assessment, PEKA Chemistry was introduced in Malaysian school curricular. PEKA Chemistry is school-based practical assessment which was introduced in the year of 1999 to replace SPM Chemistry Practical Paper. This instrument is designed with a few constructs and criteria to assess student’s SPS and MS at the upper secondary level. The assessment is done continuously for two years, starting with the Form Four students and it is continued until the said students complete their Form Five. Students are assessed formatively by their chemistry subject teacher within the process of teaching and learning. LITERATURE REVIEW From other source of study, a few problems were identified in the implementation of PEKA. From the study by Siti Aloyah Alias (2002) ‘Evaluation Of The Implementation Of The PEKA Biology Program’ it is shown that even though the students enjoyed the assessment, many students are not sure of the skills they are suppose to master. With this, it is proven that the studied students have not mastered the SPS and MS skills as stated in the objective of PEKA. This study also shows that teachers are uncertain of using and designing their own scoring rubrics. They find it difficult to mark the students evidence as they do not have a proper standard marking guide. The study on Student Ability in PEKA Biology Among Form Four Science Stream Students by Nor Aziah Darus shows that time constraint in completing experiments was one of the main problem identified. This means the amount of experiments suggested by the ministry has got no proper time allocation. The amount of workload for teachers is too taxing. Teachers are under stress where they are suppose to finish the subject syllabus and the all the PEKA in a limited time of period. This in one way or other leads to lack of interest in teaching and learning of PEKA . Perlaksanaan Peka Kimia Di Sekolah Menengah di Sekitar Daerah Batu Pahat, Johor by Lee Soh Hoon   (2 007) showed that the frequency of the PEKA implementation is not sufficient. Faiza (2002) feels that the teachers are having problem in marking the practical report because the score scheme given by the ministry is too rubric. Additional to this, teachers in certain school are facing problem of insufficient lab apparatus which leads to limitation of experiment to assess. She also quoted that student’s excellent performance in PEKA (Biology) does not promise an excellent result in Biology theoretical examinations.

TQM Week 6 Essay Example | Topics and Well Written Essays - 250 words

TQM Week 6 - Essay Example There is a common approach to issues and improvements when flow chart is used with a team. 3. is 100% inspection good? Why or why not? 100% inspection may be good in ensuring that all the products shipped are in good condition and that goods whose conditions are not satisfactory remain behind I the factories. 100% inspection is very costly and time consuming. Alternatives to 100% inspection is the acceptance sampling plan 4. Elimination of inspection on a process that is functioning in a state of statistical control is possible because both ensure and reduce the level of damages that may occur along the process. Inspection verifies conformity and the status of a product while statistical control method monitors and controls a process using statistical method. By the end of the day, both are designed to ensure quality. 5. Yes, it is possible to substitute statistical process control for inspection and still get the same quality delivered to customers. Statistical process control ensures quality in the process while inspection only allows the best products to be taken to customers. This is enough evidence that both the techniques ensure quality end product delivered to

Sustainability and Ethics Essay Example | Topics and Well Written Essays - 1000 words

Sustainability and Ethics - Essay Example The very issue of fuddling may also lead to the civil society organisations competing with each other for funding and therefore render it impossible for the civil society organisations to work in concert to have creative and constrictive regulation of the business environment.Given the fact that these organisation can be manipulated by the very businesses they are supposed to regulate, it becomes clear that they may not work for the good of the public but may seek the good of the individual people running them. In this kind of scenario, it can be said that their value to the society is not only reduced but that they are actually harmful to the very public they are supposed to protect. However, it cannot be assumed that all civil societies are easily manipulated by private business through funding. Some of them are well managed and are able to retain their authority and are run with integrity. These few civil society organisations are most likely to be helpful to the public and help i n protecting the public from other organisations that may be unethical in the way they operate.There are a number of issues that affect the way a business is run. Sustainability has become a major beacon in the development of business strategies and it is important for any business manager to be able to know what business sustainability is in order to carefully and effectively include it in the business model and ensure that the business has a good sustainability plan (Brockett and Rezaee, 2012). However, the challenge to its is that there are various definitions of sustainability, and although they are all similar, they all defer from each other in at least one critical way.

Consider a local business whose services you frequently use. What are Essay

Consider a local business whose services you frequently use. What are the main components of this company's business model - Essay Example Through these components, the business has managed to create an effective business model giving it a competitive advantage over its competitors since the products produced are of high quality and at a considerably lower price. The business currently implements the joint-stock venture form of business organization where their main suppliers and distributors are ventures in the business thus the cost of production and consequently the price of their products is lower than the competitors’. The business gets into business ventures with its suppliers and other parties of interest in the business to decrease the cost of operation and hence deliver products at a relatively low price thus increasing its overall sales and profit. By so doing, the business ensures that it is the main shareholder and owner of the business but only splits earned profits with the other ventures. Unlike the partnership form of business organization, the business does not distribute its shares among the ventures but instead only distributes the profit earned thus the business owner retains ownership of the business even when the ventures dissolve their contracts. The form of business organization is also beneficial. When the business ventures decide to leave the agreement, the business does not need to be dissolved in order to complete the request, thus it is easier to add and remove ventures from the business contract hence more flexibility for the business to adapt to changes and customer demands to increase /retain a competitive advantage over its competitors. Compared to a sole proprietorship, the form of business organization implemented by the business is advantageous in that the operational costs of the business is shared among the ventures thus the business owner does not bare losses or the burden of meeting the business’s operational costs alone. This is important since it

PACKED DISTILLATION COLUMN Essay Example | Topics and Well Written Essays - 500 words

PACKED DISTILLATION COLUMN - Essay Example In order to achieve the initial heat loss rate of the system, there was fixing of the output voltage to its maximum value and setting the reflux divider to total reflux. Once the measurement is achieved, there was changing of the reflux values to 1, 2, 4, 6, and 8 with the help of reflux divider situate on the control panel and the rate of feed flow altered to a maximum value of 70 cc/min. Waiting period of 20 minutes was recommended upon the change of reflux ratios and system reaching its steady state. It was then possible to identify the time at which the system reached its steady state by checking at the temperature indicators with the help of a thermocouple selectors. To obtain the heat loss rate of the initial experiment for every reflux ratio specific values, it was recommended to obtain the feed samples and to identify the top products with respect to the namesake valves. These parameters were obtained in the cylinders used for measuring and cooling in the refrigerator finally followed to temperatures of 15-16oC. Once the required temperature was achieved, the solutions specific gravity was measured by use of a hydrometer. Matching the reading obtained followed to a closer figure of the charts specific gravity giving approximate alcohol percentage in the solution. In addition, the amount of fluid passing through a given time interval was measured to obtain top product flow rates. A constant feed rate supply is maintained by channelling the supply from a head tank and backing it up with the help of feed tank as indicated in the start-up procedure. The other pipes are used to supply the liquid from top product tank to bottom product tank and finally to feed tank. To constitute the feed, return the products collected from the top, the bottom, and any sample that had been taken for measurements back to the feed tank (McKeown and Chalfant, 2000).   The interlock of the system are used to protect condenser coils of the glass from thermal shock when water

How Has Hooliganism (Spectator Violence) Permeated The World Of Essay

How Has Hooliganism (Spectator Violence) Permeated The World Of English Soccer - Essay Example The activities or manner is now known as soccer hooliganism which began in England near the beginning of 1950's (Giulanotti, 1994, Pp 12-13). In other European countries, parallel models of behaviour appeared about fifteen or twenty years later, near the beginning of 1970's. Italian fans fashioned a mainly obsessive variety of football support known as Ultras, who are now a chief force in the Italian sport and are widespread in a some other EU states. Football hooliganism is extremely complicated to describe, mostly for the reason that the media have been tremendously supple and undefined in assigning the "hooligan" tag to diverse occasions. The majority to mean disarray or confusion concerning football enthusiasts sees football hooliganism. Frequently this engages illegal actions and in the majority - but surely not all - cases takes place either at or just earlier than or after a football contest. Much football-throng chaos is impulsive, but a lot is set by bunch of criminals or gangsters who connect themselves to football societies and assemble to meet, and clash, from other societies (Crawford, 2004, Pp 42-43). It is frequently stated that hooliganism at football competitions turn out to be much more widespread in the 1970's and 1980's, with extra details of range of violence at contests. Nevertheless, yet again it is hard to know whether the quantity of chaos amplified or whether the rising media attention in, and exposure of, throng's chaos has destined it is reported faraway more often. Fundamental Problems Of Hooliganism Hypothetical explanations of football spectator hostility dwell in four different categories. First, there is the early on approach which accentuates that hooligan activities is a representative effort by blue-collar fans to reinstate some power over a game which they feel gradually more estranged from. Second, there is the ethogenic approach, which sees football watchers fighting as a custom appearance of mannish violent behavior. A third clarification, the planned segmentation approach focuses the implication of lower working class group arrangements and premature socialization as the key to perceptive the models of violent behavior shown by football hooligans. A concluding group of approaches see football viewer's chaos as a way of recompensing for the defeat of society sourced by post-war business and municipal expansion. This analytical research supplies a critical evaluation of some key features of the outcomes of comebacks to racism within British football. Other three features are recognized as: the conflation of racism with hooliganism'; the responsibility of antiracist operations within the sport; and the refutation of the trouble of racism within football sport. It is disputed that even as some of these interferences are praiseworthy, a common flaw is a malfunction to understand the environment and forcefulness of diverse racisms. This worry reflects more universal debates about the need to theories the intricacy and variety of the notion of racism and to recognize its opposing temperament. Writers in the past have stressed out the significance of touching away from extraordinary outsets of

How slaves were affected Essay Example for Free

How slaves were affected Essay When the African Americans were introduced to slavery, they didnt accept what was happening to them and how they were being treated, but as time passed working for their masters, not only physical, but mental abuse took its toll and soon they began to believe the way they were living was normal and alright. Punishment played a giant role in slave life. It showed the consequences of not doing what was asked or disobeying their master thus instilling fear in every single slave the owner possessed. Charity Anderson recalls, But honey chile, all white folks warn t good to dere slaves, cause Ise seen poe niggas almos toe up by dogs, and whipped unmercifully, when dey didnt do lack de white folks say. Mary Reynolds remembers, I seed them put the men and women in the stock with they hands screwed down through holes in the board and they feets tied together and they naked behinds to the world. Solomon the [sic] overseer beat them with a big whip and massa look on. The niggers better not stop in the fields when they hear them yellin. They cut the flesh most to the bones and some they was when they taken them out of stock and put them on the beds, they never got up again. These two accounts show just what these poor slaves had to deal with. They were constantly watched, and felt that if they just as much as gave a superior a wrong look, they would be beaten, or even worse, killed. Of course slaves saw this as inhuman but had no choice to obey as their masters said. There is much evidence that shows how quick they learned to do as they were told and after a period of time, many slaves accepted the idea of being just thata slave. This transformation started with the servants becoming fearful. Surviving was a game of smarts, hard work, and willpower. In order to live, slaves would allow their masters to beat and punish them without questioning so as not to risk a painful and senseless death. Snitching on other slaves who planned to escape was a good way to show their masters how loyal they were. Many slaves went as far as calling their masters nice and sometimes even boasting about their masters to other servants on different plantations. These small acts helped many stay alive but living oppressed lives affecting their minds and emotions forced themselves to cope with their sadness. Singing was common among slaves to express themselves and their hardships. Frederick Douglass recollects, They told a tale of woe which was then altogether beyond my feeble comprehension; they were tones loud, long, and deep; they breathed the prayer and complaint of souls boiling over with the bitterest anguish. The servants shared their feelings with each other through these hymns and so it made them strong enough to have the willpower to keep living by obeying and doing as they were told. Dogs lived a better life than many slaves, We had very bad eatin. Bread, meat, water. And they fed it to us in a trough, jes like the hogs. And ah went in may [sic] shirt till I was 16, nevah had no clothes. And the flo in ouah cabin was dirt, and at night wed jes take a blanket and lay down on the flo. The dog was supeior to us; they would take him in the house. -Richard Toler. The serfs accepted that they lived worse than dogs and at this point, it becomes evident that slaves began accepting th e life of slavery. They knew escaping was a bad idea because they would have no shelter, food, or clothes. If they were caught, they would be in the worst kind of trouble so they were forced to keep living the oppressed life. Being beaten and abused had them physically and mentally feeling that they were a lower race. Being intimidated all of the time had a harmful affect and they started to see slavery as acceptable. Their owners didnt allow them to read or write so living with a roof over their head made them feel privileged. Mr. William McNeill says, The escaped slaves were always trailed down by hounds; they never got away, there were always some good slaves to tell on others. I was glad when the slaves gained their freedom, even though we had a large number and lost plenty of money. They made many people rich and got nothing but punishment as a reward. They tell that some of the masters were good but I never did see a good one. This man is one that didnt buy into slavery and kept his mind from being brainwashed like many other slaves. He knew deep down that slavery was wrong and kept the truth in his reality. Even after the slaves were freed, life for them wasnt as great as they hoped it would be and they soon realized that being freed was near as bad as being slaves. Being freed toyed with their minds; just like they became slaves and felt out of place in the beginning, they were put into another  tough position to have to readjust once again. An after, soon after when we found out that we was free, why then we was, uh, bound out to different people. Anall such people as that. An we would run away, an wouldn stay with them. Why then wed jus go an stay anywhere we could. Lay out a night in underwear. We had no home, you know. We was jus turned out like a lot of cattle. You know how they turn cattle out in a pasture? Well after freedom, you know, colored people didn have nothing. Colored people didnhave no beds when they was slaves. We always slep on the floor, pallet here, and a pallet there. Jus like, uh, lot of, uh, wild people, we didn, we didn know nothing. Didn allow you to look at no book. An there was some free-born colored people, why they had a little education, but there was very few of them, where we was. An they all had uh, what you call, I might call it now, uh, jail centers, was jus the same as we was in jail. -Fountain Hughes. This man described how, after being freed, he and his family lived the life that nomads lived. They traveled around aimlessly, trying to find any place they could possibly stay. He described themselves like cattle which was an understatement because cattle could at least count on being fed. They could eat the grass of the land but the newly freed slaves would be lucky if they could find a piece of fruit. The freed slaves had no money, no beds like Fountain said, no education, basically they had nothing to call their own. Living free was as if they were living in jail Hughes thought, and many others agreed. An my father was dead, an my mother was living, but she had three, four other little children, an she had to put them all to work for to help take care of the others. So we had what you call, worse than dogs has got it now. Dogs has got it now better than we had it when we come along. -Richard Toler. Families were torn apart when all members had to work in order for the family to be able to buy the essential necessities they needed to live. Toler said dogs have better lives now than the lives of black families after being freed which shows just how much of a mess the south was in. Many white people did not accept this idea of freeing the slaves so this had many colored people feeling insecure and out of place. Some white people would go out of their way to try and hurt the colored people like the KKK did.  Frederick Douglass talks about the idea of trust in Getting Help from Others He said he met an Irishman who felt it was a pity for Douglass to be a slave. He then told Douglass to run away to the north where he would find friends there to help him. I pretended not to be interested in what they said and treated them as if I did not understand them; for I feared they might be treacherous. White men have been known to encourage slaves to escape, and then, to get the reward, catch them and return them to their masters. Douglass had this distrust when he was a slave but these feelings were carried on even after people like Douglass were freed. They felt they could not trust anyone but their own people. This idea is seen in the Tar Baby story as well. The main purpose of this tale was to show black people that they shouldnt go out of their way to talk to others. It was better to keep their mouths shut and thoughts to themselves because opening up to white folks could only get them into trouble. Since the colored people did not fit in, they kept to themselves which didnt seem like true freedom. Douglass also said in Thoughts of Escape that he and the slaves rather bear those ills we had, than fly to others, that we knew not of. Once he and every other slave was freed, this is essentially what happened. They had to move and re-adapt to new ills and complications which challenged them as slavery had challenged them once before. The whole time being slaves, black people finally started believing that slavery was what they were meant to do and it was alright for them to be treated at a lower level. Setting them free in an unaccepting world with no help or direction forced them once again, to cope with new problems and start a new theory about what it was they were really supposed to be doing or could be doing if it wasnt working and slaving for the white man.