On July 5, 1841, Mr. Schmidt writes that he had commenced schoolkeeping, and had some days above 20 children around him.
The native children who attended the mission school were taught side by side with the few children of the whites, the missioners thinking that in a mixed school the discipline of the white children would have a steadying effect on the black. The youngest children only of the natives, generally those about six years of age, could be persuaded to submit to school discipline. They learnt readily enough, but the constant habit of going into the bush with the tribe prevented any sustained training. The children would learn the Lord’s Prayer, and then when the tribe visited the township, repeat it to the whites in the Settlement in return for a coin, a penny or a sixpence.
Education was, in fact, merely a matter of merchandise to the native youngsters; attendance at school was regarded as a service rendered to the whites, to be paid for in food.5
The missionaries tried to learn the language and culture of the Aborigines and hoped, in time, to break down their nomadic habits. Many people at that point in time, believed the Aborigines to be no better than animals – depraved like the convicts in the nearby Moreton Bay Penal Settlement. Nevertheless the Lutheran missionaries were receiving financial aid from the mission society under the auspices of the Presbyterian Church and had been warmly welcomed on their arrival by Dr Lang.
The missionaries discouraged handouts from the start. Whenever the natives helped in the building or gardening, they were paid wages in the form of food. The Aborigines came to accept the missionaries and even attended the Sunday services. They always greatly enjoyed the hymn singing.
But thieving became rife amongst the natives. Night watches had to be kept in an effort to prevent raids on gardens. Even when the missionaries were summoned to prayer by the hammering of a tin dish, the natives came to learn this was the safest time to raid. Once, Haussmann was attached on an out-station and seriously wounded. 6
The worst attack came one night on 21st March 18407 when the Aborigines approached carrying firebrands and menacing spears and clubs. … the missionaries fired warning shots to frighten them off. The commandant of the nearby Moreton Bay Penal Settlement, L. Gorman, demanded an explanation of the incident. He had heard that several natives had been wounded and regretted the incident because he had been on excellent terms with them for forty miles around. Opposition for the mission continued. The Government was convinced that Zion’s Hill should be closed down and a new mission established further away from the evil influence of the penal settlement. 8

References:
5. Sparks, H.J.J. op.cit.
6. Turner, Pam; First European Settlement of Queensland 1838-1988’, Zion Lutheran Home 1987
7. Sparks, H.J.J. op.cit.
8. Turner, Pam, op.cit.