The plan to temporarily end free travel for 11 to 17-year-olds was a condition Transport for London's (TfL) £1.6bn lockdown bailout.
Mayor of London, Sadiq Khan has called on the government drop the plans.
Children aged 11-17 who live more than two miles from their school will still be entitled to Oyster cards allowing free travel, as well as children with special medical or educational needs.
Free travel for under-18s is expected to be re-introduced, though no date has been set.