Write SQL query to solve given problem: Which resource type is commonly bought by the Los Angeles Unified School District?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT T1.project_resource_type FROM resources AS T1 INNER JOIN projects AS T2 ON T1.projectid = T2.projectid WHERE T2.school_district = 'Los Angeles Unif Sch Dist' GROUP BY T2.school_district ORDER BY COUNT(T1.project_resource_type) DESC LIMIT 1