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Coordinating conjunction: and
phrases “and” connects: “Compulsory attendance laws AND the great expenditures”

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coordinating conjunction: but
phrase “but” connects: “education is a principal instrument in awakening the child to cultural values, BUT success in life without the opportunity of an education is doubtful.”

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coordinating conjunction: yet
phrases “yet” connects: ” The state undertakes to make education available, YET it must be available to all on equal terms”

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coordinating conjunction: for
phrases “for” connects: ” Education is a key function of government, FOR it is the very foundation of good citizenship.”