This study investigates the difficulties that may arise for students as a consequence of differences that exist in mathematics education between different educational systems. The questions asked are when and why difficulties as a consequence of differences in writing or types of student problems may arise and in which way teachers and students attend to these difficulties. The focus is thus on the written parts of mathematics education and the questions are asked within the frame of general upper secondary education.In order to answer these questions, a sociocultural perspective based mainly on Sfard?s (2006) participationist theories together with Vygotsky?s (1999) general theories on development and learning is used. An important analytic tool is the discourse concept which in this context means a type of communication that brings some people together while excluding others from the communication.

Mathematics in preschool - how do preschool teachers make children aware of the matematics around them?.

Mot bakgrunden att matematikresultaten sjunker i svensk skola är det viktigt att lärare använder metoder som bygger på evidensbaserad forskning. Denna systematiska litteraturstudie syftar till att bilda en djupare förståelse för utomhusmatematik genom att undersöka lärares och elevers attityder till metoden, samt om utomhusmatematik finner vetenskapligt stöd och kan rekommenderas som undervisningsmetod.Studiens resultat visar att både elever och lärare överlag ser positivt på utomhusmatematik då metoden bidrar till ett autentiskt lärande. Många lärares uppfattningar är att utomhusmatematik gynnar de yngre eleverna och att geometri och statistik är de delar av matematiken som är lämpligast att ta med utomhus. Utomhusmatematik motsäger kursmålen i alla länder där forskning på temat genomförts och metoden har svagt vetenskapligt stöd, då för få evidensbaserade studier på området utförts..

Sale and acquisition of a business is risky, since vague legislation and lack of literature often contribute to the fact that it is not possible for the parties to know beforehand how a dispute about the agreement shall be resolved. The objective of this thesis is to clarify what should be applied in terms of liability and the allocation of risks between the parties, in order to help avoid disputes about the agreement. In order to fulfill the purpose of the thesis, the legal status of the agreement has been investigated, as well as the question whether the sale of goods act should be applied, even though the sales agreement between the parties should be the primary regulation. Furthermore, another question that has been investigated is whether the buyer?s duty to investigate, and the seller?s duty to inform, affects the allocation of risks between the parties, and thereby also their liability..

3nine has developed oil mist separators for the manufacturing industry. They are used in factories and workshops in Sweden as well as many other countries. The basis for this thesis is to investigate the performance of these separators in applied environments under different circumstances and to find factors that influence the performance. It has been shown both theoretically and in laboratory environments that the sizes of the particles in the oil mist influences the performance of separation. This is to be verified under applied circumstances as well.The separators also have in most cases, after the centrifugal separation, HEPA-filters mounted that separates the remaining oil mist.

Syftet med detta examensarbete är att undersöka undervisning och lärande under en matematiklektion som präglas av traditionell skolmatematik. Metoden för undersökningen var en deltagande observation av en matematiklektion i åk 3 på gymnasiet. Med hjälp av begreppen matematikens lärandeobjekt, matematiska resurser, eleven som lärande aktör och sociomatematiska normer har jag tolkat de resultat som genererats från observationen. Två slutsatser som kan dras av undersökningen är att eleverna stimuleras till att bli oberoende lärande aktörer i undervisningen av traditionell skolmatematik samt att det i första hand är läraren som synliggör potentiella matematiska resurser för eleverna. Medvetenheten om elevernas användande av matematiska resurser skulle kunna påverka elevernas lärande genom att läraren synliggör matematiska resurser på ett mer medvetet sätt..

The aim is to examine how students with attention difficulties may demonstrate their mathematical understanding through visual representations. A curiosity about how students think about mathematics, national tests and Concepts cartoons has also permeated the study. With help of observations combined with interviews and actively work for a week, the study shows an idea of how visual representations can help students with concentration difficulties to stay focused on their tasks. I chose a selection of pupils to do some mathematical tasks from the national tests which they had not been able to solve before. Now in the form of Concepts cartoons, which I designed, they managed to solve the same mathematics data. In my study treatment and interaction reveals as key pillars for a successful educational work with the students with concentration difficulties. Thus, all pupils who previously have been unable to solve these assignments on the National test were now able to show their mathematical understanding supported by visual representations..

The purpose of this paper is to analyze the driving forces and barriers which may exist at the implementation of green supply chain management (GSCM) within public organizations. Suggestions that may increase or reduce driving forces and barriers to public activities will also be provided, where such is found. The background of the study is that the public sector is such a major customer for many companies / providers, which makes the sector able to highly affect its suppliers. This essay is based on literature studies. The results showed that GSCM is a relatively unexplored area, especially applied on the public sector.

The aim of this essay is to examine why and how three teachers who work in elementary classes choose to use ability grouping during math lessons and what they think of ability grouping as a method to individualize the activities according to the pupil?s needs.I chose one main question for this study that is the following:What is the teacher?s point of view and experience of ability grouping in teaching mathematics?And three sub-questions:What are the motives behind the choice of ability grouping?What are the advantages of ability grouping?What are the disadvantages of ability grouping?In order to be able to answer my questions, I used the qualitative method. I interviewed three teachers who work in the elementary classes (First to fifth grade) to find out what they think about ability grouping and how it is experienced in mathematic teaching.The result shows that the common thing between these three teachers is that they don?t use ability grouping as the only teaching method. They all agree that the whole class teaching has many benefits for the pupils.

The aim of this study was to investigate what formative assessment means and get information about how teachers? assessment practice in formative assessment can look like, based on five key strategies. I have observed five teachers in grade 4 to 6 during a week of their mathematics teaching. Formative assessment is assessment for learning and has the purpose to support students? knowledge development.

Syftet med undersökningen är att få en uppfattning om vilka matematiska aktiviteter som genomförs och kan genomföras under sångstunder på förskolor i Sverige och om de genomförs på ett sätt så att barnen arbetar mot målen i läroplanen. Detta eftersom mycket forskning tyder på att mycket matematikinlärning kan ske under sångstunder/musiklektioner. Teori och forskning säger att musik kan utveckla matematiken hos barn på många olika sätt. Min metod var att observera en sångstund på tre förskolor i en kommun och därefter intervjua förskollärarna som höll i sångstunderna. Resultatet visade att lärarna använde en hel del matematik under sångstunderna som det är, några mer medvetna om det än andra. Det visades även att pedagogerna anser att matematiken passar bra ihop med musik. Jag kan se vilka matematiska och musikaliska aktiviteter som genomfördes. Min önskan är att pedagoger ska ge barnen mycket matematikkunskaper under en sångstund.

Web 2.0 represents the next generation of creating interactive applications on the Web. The purpose of this thesis was to develop a service tailored to Web 2.0 technology, where users can post ads for free. The platform is an advertising system specially designed for animals. Surveys and interviews have been done; the result is that today?s advertising services on the Internet are not interactive and user-friendly.The users have the possibility to adapt different part of the system to their needs, such as choice of themes.

The supply of uninterruptible power can be applied to many areas wherecontinuous operation is highly prioritized.The application of uninterruptible power for motor operation is facilitatedusing a frequency converter. Direct current operated frequency converters canbe applied directly to the power reserve which removes the need for additionalpower-converting.Batteries have long constituted the power reserve but advancements inthe development of ultracapacitors have created a viable substitution. Ultra-capacitors have high energy storing capabilities and can be applied to highpower applications.Maxwell is a leading manufacturing company of ultracapacitors and pro-vide different modules with built-in solutions for voltage balancing. Unevenvoltages between series-connected capacitors is a phenomenon caused by vary-ing capacitance. A configuration containing Maxwell?s 56V module is createdand constitutes the power reserve in the simulations.The discharge simulation shows a significant current that could damagethe system.

Arbetets syfte är att undersöka hur högstadieelever för matematiskt resonemang. De frågeställningar som studien inriktas på är vilka lösningsstrategier elever väljer då de resonerar matematiskt såväl som vad  det finns för skillnader och likheter mellan de yngre elevernas lösningar och de äldre elevernas lösningar.Undersökningen genomfördes i två klasser, den ena i årskurs 8 och den andra i årskurs 9, på en grundskola. Eleverna fick lösa uppgifter, vilka uppmanade dem att föra matematiskt resonemang, individuellt. Resultatet av studien visar att majoriteten av undersökta elever har valt att resonera deduktivt. Jämförelsen av elevers lösningar i två årskurser visar att årskurs 9 elevers resonemangsföring präglas av större förtrogenhet med den algebraiska demonstrationen.

Syftet med detta arbete är att jämföra International Baccalaureate Diploma Programme (IB), med svenska SP och NV program. Detta görs genom att besvara frågan hur innehållen i matematikkurserna på IB programmet skiljer sig från matematikkurser som ges i de svenska programmen. Inte enbart innehållet i kurserna jämförs utan även timplanen granskas för att undersöka om arbetsbördan i programmen skiljer sig åt. Den lättaste matematikkursen som undervisas i IB programmet, Mathematical Studies är mest lik de svenska Matematik A-C kurserna. Den andra IB kursen, Mathematical Methods täcker framförallt Matematik A-E kurserna medan den tredje kursen, Mathematics Higher Level stämmer bäst överens med Matematik kurserna A-F och Matematik-diskret.