I myself is an Economics teacher and I recommended IB Elite Tutor to one of my student who was looking for regular IB Maths HL tutoring and also for his BM IA.
He got a free demo for Maths and a paid demo for BM IA and then continued for a few months. My student shared a tremendous feedback about the service. Both the teachers were senior ex IB examiners and well versed with with IB guidelines. Classes were well planned, informative and eggaging and customer support was almost proactive to help.