OLYMPIA, Wash. -

State education officials say the number of homeless students has gone up for the sixth year in a row in Washington state.

The Office of the Superintendent of Public Instruction reports more than 30,000 students were counted as homeless during the previous school year (2012-2013). That's an increase of about 3,000 students across the state from the previous year.

The state is required to count and report the number of homeless children to the federal government each year. Washington state gets about $950,000 a year from the federal government to help homeless students.

Every district is required to have a homeless liaison, to identify, enroll and setting up services for homeless students.

Authorities say it's difficult to pinpoint why the number of homeless students is increasing statewide.