CHICAGO (CBS) — Classes were canceled again Tuesday for students at two high schools in northwest suburban McHenry, as striking teachers continue to walk the picket line.

More than 150 teachers at McHenry Community High School District have been on strike since Thursday.

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A negotiating session after Monday’s school board meeting ended with no reported progress toward ending the strike.

The two sides remain hung up on teacher salaries and health insurance payments.

At Monday’s school board meeting, parents lined up to speak on both sides.

“You’re asking for more, and honestly, as a taxpayer at the bottom of the level, I don’t have it to give to you,” one woman said.

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Parent Kimberly Qualls said teachers need to be paid more, and she wonders if the school board members seriously consider the impact the situation has on students.

“After all, none of you have students in the district, so this strike is no sweat off your back. Your children are not affected. A less quality teaching staff doesn’t affect you, but it affects me,” Qualls said.

More than 2,500 students have missed four days of classes due to the strike.

Teachers and the district were scheduled to meet again Tuesday night to continue negotiations.

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Meantime, this weekend’s homecoming festivities have been left up in the air, as all athletic and extracurricular activities have been canceled until an agreement is reached.