Everyone in gr. 3 and 4 must messure your bed that must be 1.00 m.wide and 5.00 m. Long from bamboo stalk.within Sept. 12, 18:00. You can use any measure tap that at least 5.00 m. long or borrow my tape. I will check it Sept 13 begin from 09:00. If it shorter or longer than I want , it will be 1 hr. per ,1 cm.