Notice from the editor of the Sabbath School Lessons:

In the printed Sabbath School lesson, sentences in the paragraph (below this notice) in Monday's study of Lesson 2 are incorrect in their explanation of type and antitype and should read as follows:

The relationship between the two is called typology. Typology is a divinely designed, prophetic prefiguration that involves two corresponding historical realities, called antitype (original) and type (copy). Because the correspondence runs from the antitype (original) to the type (copy), we can see in Hebrews that the heavenly model that Moses had seen is referred to as “pattern” (Heb. 8:5), that is, the original, and the earthly sanctuary as “copy” (Heb. 9:24). This truth presents more evidence that the heavenly existed prior to the earthly. As Seventh-day Adventists, we are on solid biblical ground when we emphasize the physical reality of the heavenly sanctuary.

Here's how I personally understand type and antitype (which is also the theological dictionary definition):
In typology, the "type" prefigures the "antitype" or fulfillment. Thus Christ was the great Antitype of all the sacrifices in the Hebrew sanctuary. It is also apparent that the work of Christ in the plan of salvation is the antitype of all the sanctuary services, since every article in the sanctuary and every rite typified some aspect of the plan of salvation.

Please check the links I gave above for more background. I'd be interested in any documentation that the heavenly sanctuary is an "antitype."

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