CBS News -- Students at Sparks Middle School in Nevada returned to classes this week for the first time since a deadly shooting last Monday. A 12-year-old student shot and killed Michael Landsberry, a popular math teacher who tried to stop the boy.

His widow, Sharon Landsberry, talked about their last morning together with CBS Reno affiliate KTVN.

She said every morning, as Michael Landsberry left for work, he'd leave a note for her while she was sleeping.

He'd get my coffee cup out, put a sticky note on it and write 'Hey, my beautiful wife' or 'Have a good day, I love you.' It was always different every day but the last part was 'I love you,' she said.

Sharon Landsberry saved just about every single one of those notes, but she was awake last Monday to see her husband off to work.

Click here to read more at CBS News.

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