A Kansas City, Kan., woman was sentenced to nearly 10 years in prison for trying to drown her two daughters in a bathtub.

Twenty-four-year-old Johnna Green was sentenced Friday for two counts of attempted second-degree murder. She was given 59 months on each charge, with the sentences to run consecutively.

She initially was charged with two counts of attempted first-degree murder after she tried to drown her 1- and 4-year-old girls last April. She pleaded guilty to lesser charges in a plea agreement.

The Kansas City Star reports Green called police to the house, saying “I just killed my kids.” She told investigators she had “perceived” that the girls were “having difficulty with concentrating” and she wanted to prevent that problem.