Amazon.com Product Description Created specially for the first time stargazer, Starry
Night Beginner lets you quickly identify stars, planets,
and constellations with a simple point-and-click
interface. Learn about the movements of the planets, watch
the phases of the moon, or see what the stars looked like
on the day you were born...
Amazon.com Review ChemTutor Excalibur is an interactive course that
covers chemistry from high school up through the first
year of college. Each of this edition's 20 subject areas
offers a comprehensive tutorial and quiz section that
tests mastery. Structured to enable learning by discovery,
the tutorials also add interactivity and immediate
feedback that reinforce learning. Students study at their
own pace and move freely through the subjects, skipping
those they already know. One of ChemTutor Excalibur's best
features is a practice-exam section that prepares students
for finals, as well as the SAT II Subject Test in
Chemistry, the AP Chemistry Exam, and state proficiency
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