I suggest you watch the video by Paul Kirkwood on "ethical theories kept simple". It is very simple to understand the topics as he explains it in a very simple way. To find it:
Technical articles, videos and podcast
scroll down and click P1 governance, Risk and Ethics
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click the "watch now" on ethical theories kept simple by Paul Kirkwood
In summary, he explains that deontological also known as non-consequentialist theory view is that:
-action drives moral decision
-an act is right or wrong in itself and does not depend upon any other consideration.
-moral right or wrong is not dependent on the outcome
-the means are more important than the ends
While teleological also known as consequentialist theory view is that:
-outcome drives moral decision
-an act is right or wrong depending on the favourableness of the outcome
-moral right or wrong is dependent on the outcome
-the ends are more important than the means
For example, for a deontological ethics, child labour is always wrong even if that is the only source of income for the family. But a teleological ethics would argue that because this is the only source of income for the family, the child should be allowed to work for the survival of the family.
A deontologiest believes there are certain principles that are always true, whatever the consequences. The right or wrong of an action is determined by looking at the moral attitude behind the action.
Teleology: A teleologist( also known consequentialist) believes that ethics are driven by outcomes, not actions. Provided that an action achieves a 'good' or desirable outcome the action is ethical.A decision is right or wrong depends on its consequences or outcomes.
Teleology is a consequentialist and somehow relates to relativism, this concept states that it depends on the situation's outcome whether it is ethical or unethical, dentology ( absalutism ) says that there is one set of priciples applicable at all times, all places and situations regardless of the outcome.
I think an example of child labour whereby a deontology approach would mean that it is always wrong to use child labour but a teleology approach would look at what is about to be achieved using child labour.
I have found this youtube video a lifeline.
It covers ethical theories which include teleology and deontology.