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A knowledge of the four operations from lessons N2a, N2b, N2c, and N2d is assumed.

N12a – Interpreting fractions and percentages as operators

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Ballot
Opinion polls are examples of questionnaires which are used to gauge public opinion. They most used in the run-up to an election to try and forecast who the public will vote for.

This page from Britain Elects shows the latest data collected by pollsters about individual voting intentions (external link)

survey

Questionnaires are also used by businesses for market research. The idea is that companies can use this data to make decisions which will make them more money. The website SurveyMonkey, for example, is an example of a survey-provider which individuals and businesses use to conduct questionnaires. SurveyMonkey was founded in 2009 and was worth over $1 billion by 2012, such is the value of questionnaires.

SurveyMonkey Business Surveys page (external link)

https://www.surveymonkey.com/mp/business-surveys/

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A knowledge of the four operations from lessons N2a, N2b, N2c and N2d is assumed – particularly the ability to add and subtract.

An understanding of the difference between strict and not strict inequalities is helpful. This is covered in lesson N1e.

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The ability to multiply and divide from lesson N2a is assumed.

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It has been another eventful Formula 1 season, with Lewis Hamilton once again emerging as world champion after an, at times, fraught battle with Mercedes team-mate Nico Rosberg.

BBC Sport has compiled the key numbers for the 2015 season, with a strong focus on Hamilton and Rosberg as well as some interesting statistics about the other drivers.

Find out who was the best starter, which driver accumulated the most penalties and plenty more besides.

43: Overall race wins, the most by a British driver

10: Wins this season (one fewer than 2014 but only Sebastian Vettel and Michael Schumacher have more in a season, having managed 13 in 2013 and 2004 respectively)

16: World championships won by British drivers (Mike Hawthorn, 1958; Graham Hill, 1962, 1968; Jim Clark, 1963, 1965; John Surtees, 1964; Sir Jackie Stewart, 1969, 1971, 1973; James Hunt, 1976; Nigel Mansell, 1992; Damon Hill, 1996; Lewis Hamilton, 2008, 2014, 2015; Jenson Button, 2009).

He is the only driver to win at least one race in his first nine seasons in F1. Alain Prost, Michael Schumacher and Sebastian Vettel all raced for parts of a season before going on a similar run. Prost took part in 11 races in 1980 before winning every year from 1981 to 1990 while Schumacher took part in six races in 1991, before winning every year from 1992 to 2006.

The only drivers to have won more grands prix than Hamilton are Schumacher (91) and Prost (51). In 2015, he overtook Ayrton Senna (41) and Vettel (42)

16: Race wins for Mercedes (Equalling record from last season. The next best is 15 for McLaren in 1988 (16-race season), Ferrari in 2002 (17-race season) and Ferrari in 2004 (18-race season)

18: Pole positions for Mercedes (equalling record from last season, shared with Red Bull in 2011 - also a 19-race season)

Biggest improvement in 2014: Ferrari won 428 points in 2015 and finished second in the constructors' championship. In 2014 they managed 216 points, their worst season in F1 for more than 20 years.

Biggest drop in 2014: Last year Red Bull won 405 points and finished second in the constructors' championship. In 2015 they scored only 187 points and finished fourth, failing to win a race for the first time since 2008.

2015 DRIVER STATS

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It has been another eventful Formula 1 season, with Lewis Hamilton once again emerging as world champion after an, at times, fraught battle with Mercedes team-mate Nico Rosberg. BBC Sport has compiled the key numbers for the 2015 season, with a strong focus on Hamilton and Rosberg as well as some interesting statistics about the other drivers.

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S2a – Frequency tables

S2b – Pictograms

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This bar chart from the 2017 National Audit Office report on Retaining and developing the teaching workforce shows the proportion of secondary schools reporting vacant positions in different regions of the country. Note that the lighter bars show 2010 data while the darker bars show 2015 data. The report formed part of an inquiry by a Parliamentary Select Committee which held a meeting in November 2017 including representatives from the teaching profession, the Department for Education, and teaching unions.

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G3a – Angles at a point, angles at a point on a straight line, vertically opposite angles

G15a – Measuring line segments and angles in geometric figures

N2b – Multiplying integers

N2c – Dividing with integers

N12a – Interpreting fractions and percentages as operators