710 résultats pour "raté"

• Mures etia,n 111igraverunt Même les rats sont partis L'expression est empruntée à un passage des len-res de Cicéron ( 14,...

  Mures etia,n 111igraverunt Même les rats sont partis L'expression est empruntée à un passage des len-res de Cicéron ( 14, 9, 1) qui évoque des bâtiments tellement mal entretenus que même les rats les ont abandonnés - on croyait en effet que les rats s'enfuyaient avant que les bâtiments s'écroulent (cf. Pline, Naturalis historia, 8, 42, 103). De telles...

• Dictionnaire en ligne: DÉSOPILER, verbe transitif.

  désopilée de mon excellent confrère Héraclius (GUY DE MAUPASSANT, Le Docteur Héraclius Gloss, 1893, page 120). 2. La documentation atteste le substantif masculin désopilement. Fait de désopiler (confer supra B). [Elle] roulait des yeux dont les mouvements eussent infailliblement produit un bruyant désopilement de ma rate (FRANÇOIS VIDOCQ, Mémoires, tome 3, 1828-29, page 331). STATISTIQUES : Fréquence absolue littéraire : 12 2

• MANET, Edouard (23 janvier 1832-30 avril 1883) Peintre Ce n'est qu'à son retour d'un voyage à bord du bateau-école Le Havre et Guadeloupe qu'Edouard Manet, qui a raté l'entrée à l'Ecole navale, fait le choix d'une carrière artistique.

• Les rongeurs

  dépourvue d'éca illes. Il présente une odeur légère de musc. • Répartition : Europe (sauf les îles}, Asie mineure. • Comportement : vit de préférence dans des zones chaudes. Il est sédentaire et hiberne dans un trou recouvert de feuilles. Loir commun (glis glis) • Caractères : Rappelle l'écureuil. LTC : 13- 19 cm; LQ: 11-15 cm; Pds : 80-300 g. • Répartition : Eurasie. • Comportement : nocturne. L'accouplement a lieu entre mai et juillet. Le loir est u...

• Humour, ironie et comique dans les Fables

  Prenons un exemple, emprunté aux fables elles-mêmes. Dans Le Rat et I'Huftre (VIII, 9}, un rat part à la déco uverte du monde. Comme il n'a vait jamais auparavant quitté son « champ "• il s'étonne du moindr e spectacle, qu'il interprète de travers. Une taupin ière lui semble une montagne. Sa naïveté est plaisante. Le personnage du nà if est d'ailleur s trad itionnel dans la comédie. Mais La Fontaine ajoute, pour expliquer la candeur de son Rat, qu'il n'é...

• q uolibet quotité R rab rabattre rabot rabrouer raccommoder racheter racler 1 rade radiant, ante 2 radier radiolaires radouber rafflesia 2 raglan raguer raie rainer 1 rafle raja, rajah 2 rallumer ramatou 1 rame râle ramentevoir ramier, ière ramper rance rand ranidés rapace rapetisser rapière rapporter, rapport 1 rase-mottes rassurer ratafia rater ratio ratites rature ravauder ravigoter raviver 2 rayonner ras réaccoutumer réagir r

  R ra b ra ba ttre ra bo t ra bro ue r ra cco m moder ra che te r ra cle r 1 r a de ra dia nt, a nte 2 r a die r ra dio la ir e s ra doube r ra ffle sia 2 r a fle ra gla n ra gue r 1 r a ie ra in e r ra ja , r a ja h 2 r â le ra llu m er ra m ato u 1 r a m e ra m ente vo ir ra m ie r, iè re ra m pe r ra nce ra nd ra nid és ra pa ce ra pe tis se r ra piè re ra ppo rte r, r a ppo rt 1 r a s ra se -m otte s ra ssu re r ra ta fia ra te r ra tio ra tit e s ra tu re ra va ud er ra vig o te r ra...

• Manitoba - Facts and Figures.

  Infant mortality rate 7 deaths per 1,000 live births (2005 estimate) Health-care expenditure per capita 4,406 Canadian dollars (2004 estimate) Adult population with high school diploma 79 percent (2001 estimate) GOVERNMENTProvincial governmentPremier Gary Doer Legislature Legislative Assembly 57 members National representationMembers of the Canadian Senate 6 Members of the Canadian House of Commons 14 ECONOMYGross domestic product (GDP, in Canadiandollars) C$45 billion (2006)...

• New Brunswick - Facts and Figures.

  Infant mortality rate 4 deaths per 1,000 live births (2005 estimate) Health-care expenditure per capita 3,865 Canadian dollars (2004 estimate) Adult population with high school diploma 84 percent (2001 estimate) GOVERNMENTProvincial governmentPremier Shawn Graham Legislature Legislative Assembly 55 members National representationMembers of the Canadian Senate 9 Members of the Canadian House of Commons 10 ECONOMYGross domestic product (GDP, in Canadiandollars) C$25 billion (2006)...

• Québec - Facts and Figures.

  Infant mortality rate 5 deaths per 1,000 live births (2005 estimate) Health-care expenditure per capita 3,667 Canadian dollars (2004 estimate) Adult population with high school diploma 84 percent (2001 estimate) GOVERNMENTProvincial governmentPremier Jean Charest Legislature National Assembly 125 members National representationMembers of the Canadian Senate 24 Members of the Canadian House of Commons 75 ECONOMYGross domestic product (GDP, in Canadiandollars) C$283 billion (2006)...

• British Columbia - Facts and Figures.

  Infant mortality rate 5 deaths per 1,000 live births (2005 estimate) Health-care expenditure per capita 3,970 Canadian dollars (2004 estimate) Adult population with high school diploma 86 percent (2001 estimate) GOVERNMENTProvincial governmentPremier Gordon Campbell Legislature Legislative Assembly 79 members National representationMembers of the Canadian Senate 6 Members of the Canadian House of Commons 34 ECONOMYGross domestic product (GDP, in Canadiandollars) C$180 billion (2...

• Saskatchewan - Facts and Figures.

  Infant mortality rate 8 deaths per 1,000 live births (2005 estimate) Health-care expenditure per capita 4,035 Canadian dollars (2004 estimate) Adult population with high school diploma 80 percent (2001 estimate) GOVERNMENTProvincial governmentPremier Lorne Calvert Legislature Legislative Assembly 58 members National representationMembers of the Canadian Senate 6 Members of the Canadian House of Commons 14 ECONOMYGross domestic product (GDP, in Canadiandollars) C$46 billion (2006...

• Ontario - Facts and Figures.

  Infant mortality rate 6 deaths per 1,000 live births (2005 estimate) Health-care expenditure per capita 4,274 Canadian dollars (2004 estimate) Adult population with high school diploma 88 percent (2001 estimate) GOVERNMENTProvincial governmentPremier Dalton McGuinty Legislature Legislative Assembly 103 members National representationMembers of the Canadian Senate 24 Members of the Canadian House of Commons 103 ECONOMYGross domestic product (GDP, in Canadiandollars) C$558 billion...

• Alberta - Facts and Figures.

  Infant mortality rate 7 deaths per 1,000 live births (2005 estimate) Health-care expenditure per capita 4,275 Canadian dollars (2004 estimate) Adult population with high school diploma 83 percent (2001 estimate) GOVERNMENTProvincial governmentPremier Ed Stelmach Legislature Legislative Assembly 83 members National representationMembers of the Canadian Senate 6 Members of the Canadian House of Commons 26 ECONOMYGross domestic product (GDP, in Canadiandollars) C$240 billion (2006)...

• Nova Scotia - Facts and Figures.

  Infant mortality rate 4 deaths per 1,000 live births (2005 estimate) Health-care expenditure per capita 4,021 Canadian dollars (2004 estimate) Adult population with high school diploma 85 percent (2001 estimate) GOVERNMENTProvincial governmentPremier Rodney MacDonald Legislature House of Assembly 52 members National representationMembers of the Canadian Senate 10 Members of the Canadian House of Commons 11 ECONOMYGross domestic product (GDP, in Canadiandollars) C$32 billion (200...

• Prince Edward Island - Facts and Figures.

  Infant mortality rate 2 deaths per 1,000 live births (2005 estimate) Health-care expenditure per capita 3,926 Canadian dollars (2004 estimate) Adult population with high school diploma 80 percent (2001 estimate) GOVERNMENTProvincial governmentPremier Patrick George Binns Legislature Legislative Assembly 27 members National representationMembers of the Canadian Senate 4 Members of the Canadian House of Commons 4 ECONOMYGross domestic product (GDP, in Canadiandollars) C$4.3 billio...

• Newfoundland and Labrador - Facts and Figures.

  Infant mortality rate 6 deaths per 1,000 live births (2005 estimate) Health-care expenditure per capita 4,253 Canadian dollars (2004 estimate) Adult population with high school diploma 79 percent (2001 estimate) GOVERNMENTProvincial governmentPremier Danny Williams Legislature House of Assembly 48 members National representationMembers of the Canadian Senate 5 Members of the Canadian House of Commons 7 ECONOMYGross domestic product (GDP, in Canadiandollars) C$26 billion (2006)...

• Pr. Drizenko, Anatomie du tube digestif. I- Organogénèse: (...) L'inégalité entre la face

  ganglions semi-lunaire. Ensuite c'est en suivant les trajets artériels que ces nerfs vont maintenant rejoindre la paroi du viscère creux pour faire relai avec les corps cellulaires du plexus intra-mural. Dernier relai de ces voies autonomes dans la mise en œuvre du message qui va déclencher la contraction, par exemple, des fibres musculaires lisses pour expliquer le péristaltisme qui fera avancer le bol alimentaire. Il y a également un aller et un retour dans ces fibres. Il y a non seulement de...

• Fables De La Fontaine

  02 - Le Berger et la Mer, commentaire composé, intelledoc  02 - Le Chat et les deux Moineaux, commentaire composé, intelledoc  02 - Le Corbeau et le Renard, commentaire composé, intelledoc  02 - Le Lion et le Chasseur, commentaire composé, intelledoc  02 - Le mal marié, commentaire composé, intelledoc  02 - Le Pot de terre et le Pot de fer, commentaire composé, intelledoc  02 - Le Savetier et le Financier, commentaire composé, intelledoc  02 - Les deux Pigeons, commentaire composé, intelledoc  0...

• Le mot "veine" dans l'oeuvre de DESCARTES

  Et pourquoi la concavité gauche du coeur et la grande artère seraient-elles plus amples et plus larges que la concavité droite et laveine artérieuse ? ce qui se confirme parce qu'on voit que les animaux qui n'ont point de poumons n'ont aussi qu'une seule concavité dans le coeur,et que les enfants, qui n'en peuvent user pendant qu'ils sont renfermés au ventre de leurs mères, ont une ouverture par où il couledu sang de la veine cave en la concavité gauche du coeur, et un conduit par où il en vient...

• les principaux courant théoriques de l'enseignement et de l'apprentissage

  Avant J.C. 500-400 16 e et 17 e siècles 19 e siècle (fin) 20 e siècle (début) 20 e siècle (milieu ) 20 e siècle Empirisme an glais Loc ke Hum e Empirisme Aristo te Empirisme logique Co mte Bern ard Béha viori sme Pavlov Watso n Th orndi ke Car tésia nisme Descartes Psycha na lys e Fre ud Ericks on Gestaltisme Wert heim er Ko ffka Constr ucti visme...

• Isotope - chemistry.

  depends on the fact that when water undergoes electrolysis, the lighter hydrogen isotope tends to come off first, leaving behind a residue of water that is enriched inthe heavier isotope. D Gaseous Diffusion This and the electromagnetic method of separating isotopes of uranium afforded the first large-scale separation ever achieved. The problem of separating uranium-235from uranium-238 arose in 1940 after the demonstration of the susceptibility of the 235 isotope to fission by neutrons. Uranium...

• Cancer (medicine).

  unable to repair the DNA damage, p53 instructs the cell to undergo programmed cell death, or apoptosis , putting a stop to runaway cell division before it starts. Programmed cell death is a normal part of cell life and is tightly controlled by many genes, primarily p53. In a cancerous cell, one or more mutations prevent these genes from doing their jobs. When mutated, p53 allows a cell to continue to divide, even with damaged DNA.This can lead to additional mutations in proto-oncogenes or tumor...

• clonage (Biologie et Anatomie).

  le noyau somatique. C’est en quelque sorte un jumeau de cet organisme, mais produit à l’âge adulte. Si cette technique fait depuis 1996 l’objet de nombreuses expériences sur des mammifères variés, elle est cependant loin d’être au point. Tout d’abord, seule une infimepartie (quelques pour cent à peine) des embryons clonés se développent normalement et arrivent à terme. De surcroît, parmi ces derniers, une forte proportion développe,au cours de sa croissance ultérieure, diverses pathologies et m...

• Aerospace Medicine - astronomy.

  medically as aeroembolism and popularly as the bends, leads to confusion, paralysis, or neurocirculatory collapse. The most characteristic symptoms of the bends arepain in the large joints resulting from pressure of the gas on tendons and nerves, together with spasm of the blood vessels. Preflight inhalation of pure oxygen toeliminate nitrogen from the system has proved valuable as a preventive measure. Rapid decompression, resulting from accidental failure at high altitudes of thepressure withi...

• Black Death.

  disappeared in the West. V DISAPPEARANCE OF PLAGUE Plague became less common in Europe after the 1530s. The last plague in England was in 1665, the last in Western Europe in 1722. Numerous theories have beenoffered to explain the disappearance of plague. It has been argued that black rats, the primary carriers of plague, may have been replaced by larger brown rats that donot carry the infection. A second theory suggests that increased immunity among the rodents that carried the disease or chang...

• Black Death .

  disappeared in the West. V DISAPPEARANCE OF PLAGUE Plague became less common in Europe after the 1530s. The last plague in England was in 1665, the last in Western Europe in 1722. Numerous theories have beenoffered to explain the disappearance of plague. It has been argued that black rats, the primary carriers of plague, may have been replaced by larger brown rats that donot carry the infection. A second theory suggests that increased immunity among the rodents that carried the disease or chang...

• Le cas de l'Homme aux rats

  tiques et avait conçu à son égard des sentiments ambi­ valents. Refoulée dans l'inconscient, mais inaltérablement liée à cet épisode, sa libido s'était réveillée au récit du supplice des rats évoquant avec une composante sadique, l'érotisme anal de la petite enfance. La reviviscence d'une haine· coupable vis-à-vis .du père avait engendré un état de remords paralysant et -le besoin d'exécuter, à l'occasion des moindres actions, des rites conjura...

• Church of Jesus Christ of Latter-day Saints.

  yearly visited a book written in a hieroglyphic script on golden plates buried in a nearby hill; the book’s location, he said, had been disclosed to him by an angel. In 1830he completed the translation of these plates, “by the gift and power of God,” and published the Book of Mormon, which he believed to be a religious record of theancient inhabitants of North America. On April 6, 1830, he organized the Church of Christ, soon known by its present title, the Church of Jesus Christ of Latter-daySa...

• Bat - biology.

  tomb bat has rather small ears. The shapes of bat ears are extremely varied. The wide ears of the Australian false vampire bat meet above the head and are fused.Many bats are able to turn their ears in the direction of faint noises. Bat hearing and its use in echolocation are highly developed. Some bats have large, conspicuous eyes, while others may have small beady eyes. This variation suggests that vision plays different roles in the lives of various species.Despite the familiar expression, 'b...

• Costa Rica - country.

  protection from future deforestation is not guaranteed. Deforestation places Costa Rica’s rich biodiversity in danger. The country’s location on the cusp between Northand South America and its abundance of tropical forests make it home to a great variety of species, many of them rare and threatened. Deforestation also contributesto the country’s problematic rate of soil erosion. Costa Rica is party to international treaties concerning biodiversity, climate change ( see Global Warming), endangere...

• Bhutan - country.

  languages ( see Indo-Iranian Languages) and follow Hinduism. Nepalese people constitute a significant portion of Bhutan’s population. They are the most recent settlers, occupying south central and southwestern Bhutan. TheNepalese are mainly Rai, Gurung, and Limbu ethnic groups from the eastern mountains of Nepal. Nepalese immigration has been banned since 1959, when theBhutanese government feared the minority would become too populous. Nepalese are not permitted to live in the central Middle Hi...

• Honduras - country.

  A Principal Cities The capital and largest city of Honduras is Tegucigalpa (2006 estimate, 1,324,000), located in the south-central highlands region. The country’s second largest city isSan Pedro Sula (549,498). The principal city and commercial center in the north, it lies in the heart of the vast banana plantations on the Caribbean Sea. La Ceiba(127,590) and Puerto Cortés (90,161) are among the leading Caribbean ports. B Language and Religion Spanish is the official language and is spoken by...

• Respiratory System.

  rapidly, or laughs while swallowing, the swallowing reflex may not work, and food or fluid can enter the larynx. Food, fluid, or other substances in the larynx initiate acough reflex as the body attempts to clear the larynx of the obstruction. If the cough reflex does not work, a person can choke, a life-threatening situation. TheHeimlich maneuver is a technique used to clear a blocked larynx ( see First Aid). A surgical procedure called a tracheotomy is used to bypass the larynx and get air to...

• Croatia - country.

  III PEOPLE OF CROATIA The total population of Croatia at the time of the 1991 census was 4,784,265; a 2008 estimate was 4,491,543. During and after the war ethnic Serbs fled Croatia whileethnic Croats moved in. Croatia’s population growth rate in 2008 was -0.04 percent, despite population gains due to immigration. Croatia’s natural population growthrate, which measures births and deaths, has been negative since 1998. Life expectancy at birth was 75 years in 2008. The population density in 2008...

• Bangladesh - country.

  F Environmental Issues Waterborne diseases such as cholera are a serious threat to public health in Bangladesh. Until the 1970s, many of Bangladesh’s people became sick from drinkingpolluted water drawn from surface rivers. Aid agencies such as the United Nations Children’s Fund (UNICEF) built shallow wells throughout the country to help provide asafe source of drinking water to Bangladesh’s poor. In the 1990s, however, it was discovered that many of these wells were contaminated by arsenic, a...

• Globalization.

  higher living standard for their people. The World Bank made loans to developing countries for dams and other electrical-generating plants, harbor facilities, and otherlarge projects. These projects were intended to lower costs for private businesses and to attract investors. Beginning in 1968 the World Bank focused on low-cost loansfor health, education, and other basic needs of the world’s poor. B International Monetary Fund The IMF makes loans so that countries can maintain the value of thei...

• Cambodia - country.

  The population of Cambodia is 14,241,640 (2008 estimate). Population growth per year is estimated at 1.8 percent, one of the highest rates in Asia. The rate of infantmortality is also high. The population density is 81 persons per sq km (209 per sq mi), with the densest concentrations on the heavily cultivated central plain. Themountainous regions of the country, where malaria is widespread, are thinly populated, as are the poorly watered northern provinces. During the late 1970s, under thebruta...

• Intelligence.

  education. Teachers had no way of knowing which of the “slow” students had true learning problems and which simply had behavioral problems or poor prior education.In 1904 the French Ministry of Public Instruction asked Binet and others to develop a method to objectively identify children who would have difficulty with formaleducation. Objectivity was important so that conclusions about a child’s potential for learning would not be influenced by any biases of the examiner. The governmenthoped tha...

• Federal Republic of Germany - country.

  B Rivers and Lakes Rivers have played a major role in Germany’s economic development. The Rhine River flows in a northwesterly direction from Switzerland through much of westernGermany and The Netherlands into the North Sea. It is a major European waterway and a pillar of commerce and trade. Its primary German tributaries include theMain, Mosel, Neckar, and Ruhr rivers. The Oder (Odra) River, along the border between Poland and Germany, runs northward and empties into the Baltic; it provides an...

• Nebraska - geography.

  by natural resource districts to limit the rate of pumping for irrigation. C Climate Nebraska has a typical continental climate with wide seasonal variations in temperature. C1 Temperature Winter temperatures below -20°C (0° F) and summer temperatures in the upper 30°s C (lower 100°s F) are common. The average January temperature varies from about -7° C (about 20° F) in the northeast to about -2° C (about 29° F) in the southwest. The average for July, thehottest month, ranges from about 26° C...

• Nebraska - USA History.

  by natural resource districts to limit the rate of pumping for irrigation. C Climate Nebraska has a typical continental climate with wide seasonal variations in temperature. C1 Temperature Winter temperatures below -20°C (0° F) and summer temperatures in the upper 30°s C (lower 100°s F) are common. The average January temperature varies from about -7° C (about 20° F) in the northeast to about -2° C (about 29° F) in the southwest. The average for July, thehottest month, ranges from about 26° C...

• India - country.

  delta in the north, are intensely farmed. B Rivers and Lakes The rivers of India can be divided into three groups: the great Himalayan rivers of the north, the westward-flowing rivers of central India, and the eastward-flowingrivers of the Deccan Plateau and the rest of peninsular India. Only small portions of India’s rivers are navigable because of silting and the wide seasonal variation inwater flow (due to the monsoon climate). Water transport is thus of little importance in India. Barrages,...

• Learning.

  B1 Acquisition The acquisition phase is the initial learning of the conditioned response—for example, the dog learning to salivate at the sound of the bell. Several factors can affect the speed of conditioning during the acquisition phase. The most important factors are the order and timing of the stimuli. Conditioning occurs most quickly when theconditioned stimulus (the bell) precedes the unconditioned stimulus (the food) by about half a second. Conditioning takes longer and the response is...

• MOOS 6AE8posLa fin du rat Cette expression proverbiale est surtout utilisée par les auteurs comiques: cf. Philémon (fr. 177 K.-A.)...

  MOOS 6AE8posLa fin du rat Cette expression proverbiale est surtout utilisée par les auteurs comiques: cf. Philémon (fr. 177 K.-A.) et Ménandre (fr. 166 K.-A.); cl Je sera ensuite commentée par Elien (Natura animalium, 12, 10) et par les parémiographes (Diogen. 6, 66; Apost. 9. 28 ; Mant. Prov. 2, 25) : elle désigne les personnes qui se laissent mourir sans réagir, comme le rat, qui, lorsqu'il meurt de mort naturelle, se laisse partir peu à peu, ses forces le quittant progressivement. L'expressio...

• Money.

  A Early Monetary Regulations In the American colonies, coins of almost every European country circulated, with the Spanish dollar predominating. Because of the scarcity of coins, the colonists alsoused various primitive mediums of exchange, such as bullets, tobacco, and animal skins. Many of the colonies issued paper money that circulated at varying rates ofdiscount. The first unified currency consisted of the notes issued by the Continental Congress to finance the American Revolution. These no...

• Geology.

  terminology. Today the geologic time scale is generally agreed upon and used by scientists around the world, dividing time into eons, eras, periods, and epochs. Everyfew years, the numerical time scale is refined based on new evidence, and geologists publish an update. Geologists use several methods to determine geologic time. These methods include physical stratigraphy, or the placement of events in the order of their occurrence,and biostratigraphy, which uses fossils to determine geologic time...

• Railroads.

  III GAUGES The gauge of track is the distance between the inner edges of the rails at points 1.59 cm (0.626 in) below the top of the heads. In the United States, Canada, theUnited Kingdom, Mexico, Norway, Sweden, and much of continental Europe, the standard gauge is 143.51 cm (56.5 in). Why this measurement became the standard isa matter of speculation. Probably the tradition is inherited from early tramroads built to accommodate wagons with axles 1.5 m (5 ft) long; some of the early edge rail...

• Polen - geographie.

  Etwa 98 Prozent der Bevölkerung sind Polen. Die größten ethnischen Minderheiten sind Ukrainer und Weißrussen, zu den kleineren Gruppen gehören u. a. Slowaken,Tschechen, Litauer, Deutsche, Roma und Juden. Die Verstädterung hat seit dem Ende des 2. Weltkrieges zugenommen; mittlerweile leben 62 Prozent der Bevölkerung in Städten (2005). Obwohl die Bevölkerungvergleichsweise jung ist, nimmt das Durchschnittsalter ständig zu. Seit dem Ende der massiven Bevölkerungsverschiebungen in den ersten Jahren...

• Vietnam - country.

  E Natural Resources Vietnam’s most valuable natural resource is its land, particularly the fertile, alluvial soils in the Red and Mekong deltas. Some 29 percent of the land is currently beingcultivated. Vietnam has some valuable mineral resources, including gold, iron, tin, zinc, phosphate, chromite, apatite, and anthracite coal. Most deposits are located in the northernpart of the country. Few attempts were made to extract these minerals until the French takeover of Vietnam at the end of the 1...

• Ireland Facts and Figures.

  Male 75.4 years (2008 estimate) Infant mortality rate 5 deaths per 1,000 live births (2008 estimate) Population per physician 340 people (2006) Population per hospital bed 233 people (2003) Literacy rateTotal 98 percent (1995) Female Not available Male Not available Education expenditure as a share of gross national product (GNP) 5.3 percent (2002-2003) Number of years of compulsory schooling 10 years (2002-2003) Number of students per teacher, primary school 19 students per teach...