This is probably the most wide spread tarot layout, and because of this there are also a lot of different variations of it.
The version I describe here is the version that I have come to find most functional for me. This doesn't mean that this is the perfect version for everyone and I encourage you to explore this layout, maybe find other versions of it and eventually find your way of doing The Celtic Cross.

Card 1: The situation.

This is the core of the situation, how things are right now.

Card 2: What covers the situation.

Good dignified this is something that can help you in the situation. Ill dignified it's an obstacle.

Card 3: Thought and expectations.

The querents thoughts and expectations of the question at hand.

Card 4: The foundation.

What the querent has brought with him/her from earlier experiences. This is the far past that has moulded the querents personality. This is the sub-consious.

Card 5: The near past.

Something from the near past that is influencing the current situation.

Card 6: The near future.

What will happen in the near future.

Card 7: The inner world.

What the querent feels about the querent situation.

Card 8: The outer world.

How you surroundings perceive the querents way of handling the situation.

Card 9: Hopes and fears.

THe querents hapes and/or fear. Whether this is hopes, fears or both depends on the card and the reading in general.

Card 10: The outcome.

This is the final outcome, how things will look if the situation is handled according to the advises of the layout.