This volume explains that self-determined learning theory is based on the claim that learning is adjustment. This is done by showing that a causal connection exists between opportunities to learn, engagement in those opportunities, adjustments to them, and learning. The editors offer reasons for using this theory to explain learning. One is that if learning is adjustment then improving the ability to adjust will improve the ability to learn. Another reason is that it places learning where it occurs naturally, as a reaction to a provoking necessity, interest or curiosity. The last reason is that it accounts for why learners learn more when they experience freedom of choice when they are denied choice. Divided into three sections - theory construction, theory verification, and theory evaluation - the text is organized using the four steps of "Learning to Theorise: A Four Step Strategy". Step 1 defines a problem of not understanding something as discrepancy between what is known and not known about a circumstance. Step 2 searches for information and explanations to change the condition of not knowing into a condition of knowing. Step 3 evaluates the credibility and worth of the explanation constructed in step 2. Step 4 adjusts existing beliefs so they are consistent with the new theory.