LOS ANGELES (CBSLA) — The union for LA Unified teachers on Wednesday rejected the latest contract offer from the district.

The development means they are now even closer to a walkout.

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The offer included a 6 percent pay raise and it addresses class sizes.

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The teachers’ union, UTLA, called that offer “insulting.” They claim it would raise class sizes and does nothing to improve schools.

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A statement from the district says the offer sets firm boundaries against increasing those class sizes.