The sections of this selection are not numbered, so notes below are labeled by the first few words of the section title.
Introductory section. Think about the distinction between realism and interpretationism about belief. Dennett has more to say about it later, and the issue will show up in the next selection, too. The end of the section gives a nice brief description of the intentional stance and strategy and an intentional system, ideas that will be elaborated later.
"The Intentional Strategy ..." Dennett approaches intentionality here by a series of corresponding stances, strategies, and systems: astrological, physical, design, and finally intentional. Get clear about both what they have in common and how they differ. He elaborates the last by considering in turn principles for attributing beliefs, desires, and rationality.
"True Believers ..." The first part of this section (pp. 560-562) is centered on two examples-what distinguishes the case of the lectern from our own case (even when we consider Laplacean Martians)? On p. 563, Dennett states his own position about realism regarding belief. The remainder of the section (pp. 564-565) concerns the idea of internal representations. Think about what distinguishes internal representations from other internal states according to Dennett, but think also about the "fastening" of the thermostat's beliefs (see p. 564, bottom of col. 2) and Dennett's use of the example of Twin Earth.
"Why Does ..." Follow the steps from quick answers to the why-question, to a behaviorist answer to the how-question, and finally to a still fuller answer.