The arguments for grouping, streaming and setting are that children will learn more and be more interested if lessons are pitched at the right level for them and that they will be bored and possibly disruptive if they are not.
Magazines were one of the earliest mechanisms for social grouping, and before the onset of the digital age, publishers were very good at building and monetizing highly valuable networks of similar people built around different content verticals.
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For one, Google is grouping bids for computers and tablets together, since it has found they are used in similar ways (namely at home).
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For two weeks, the British forces have been consolidating on the western flank of Basra and have been grouping for the past few days on the south.
These recent Iraqi tactics indicate that insurgents watch for soldiers or others grouping around an initial attack site and then strike again.
But a victory for the opposition Revival grouping might have been worse.
The chief architects of Tuesday's rallies in Egypt are members of the National Association for Change, a grouping of opposition movements that Mr. ElBaradei assembled around him last summer.
The bureau calculated and cross-referenced lifetime earnings for each major and each career field by grouping survey respondents into eight age buckets consisting of five years, determined the median annual earnings for each age group, multiplied the number by five, and added the totals together.
Voting figures for the EU Council - the grouping of ministers, according to policy area - show that the UK government voted against or abstained 38 times out of 373.
It also does a better job of organizing your reading material, grouping items into separate folders for books, newspapers, and personal documents.
And they could not understand "why grouping of payments in bands for one, but not the other, presents data-protection or breach-of-confidence issues", as the BBC had insisted.
Dr. Abigail Zuger, a professor of medicine at Columbia University in New York, condemns the grouping of patients by race for the purposes of diagnosis or treatment.
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Construction is underway, for example, on the World, a grouping of 300 man-made islands shaped to resemble the earth.
Such grouping shows what the sector pays for final consumption.
As the regional grouping grows, so does the cost for non-members of staying out.
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Meanwhile, and this one is only beginning to return to the sights of the wider world, mass contagion remains a regular agenda item for organizations like ASEAN, the Southeast Asian official grouping.
"If you think about it, it makes it so that your networking community can do the work of organizing your communities for you, " Zuckerberg said of Facebook's grouping features.
You buy the right to display a grouping of words in front of your eyes for your private use with the aid of an electronic display device approved by Amazon.
ASEAN's senior members should start with measures that are fairly non-controversial, yet can build trust, amity and cooperation within the enlarged grouping -- the kind they themselves enjoyed for decades.
He has been (rightly) criticised for pulling his party out of the centre-right grouping in the European Parliament to which the parties of Mrs Merkel and Nicolas Sarkozy, the French president, belong, and for cultivating the Euroscepticism of his party faithful.
But the Party for Democratic Prosperity (PDP), the main ethnic Albanian opposition grouping, said later it needed more time.
They insist on a wider grouping, backed by strict budgetary discipline, and harsh sanctions for bad behaviour.
It would also establish a new post of president of the European Council - the grouping of EU states' leaders - and a high representative for foreign affairs.
Even the principle of grouping schools together in federations is to be subservient to the drive for academies - individual schools in a federation will be able to become academies without the consent of the federated governing body.
You might speculate (correctly) that the likelihood of the region ever putting a grouping like this together again -- of engaging the three Chinese economies, for example -- is next to zero.
To further mix things up, each grouping includes a wide number of wine options, and it is not unusual for the sommelier to offer two different people at the same table having the same dish two different wines.
This new mention feature could be an interesting way for Facebook users to find out what the popular topics of discussion among friends are, by grouping the updates together.
FORBES: Facebook Testing New 'Mention' Feature On News Feeds
Their regional grouping, Western nations, was the only contested election - Sweden and Greece also ran for seats.
The top UN official for the Central African Republic, Margaret Vogt, said the ceasefire agreement, witnessed by the regional grouping Economic Community of Central African States (ECCAS) - was to come into force within 72 hours of being signed.
Fifa says it called for an emergency council meeting to approve the move, or to organise elections, but instead of one meeting each grouping organised its own gathering.
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