Merge pull request #38 from codehsbooks/kurt_add_readmes

Kurt add readmes

Author: hepler

Basic-Java/README.md

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 # Basic Java
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+Learn the basics of the Java programming language. This unit covers printing, variables, types, as well as how to use the basic control structures in the Java language.

Classes-And-Object-Oriented-Programming/README.md

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 # Classes and OOP
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+This unit teaches students the basics of Object-Oriented Programming in Java, which is a powerful programming paradigm. Students will learn how objects store data and interact with each other in Java programs. Students will design and implement classes and extend classes using inheritance.

Data-Structures/README.md

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 # Data Structures
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+Learn basic data structures in Java including arrays, ArrayLists, 2 dimensional arrays, and HashMaps.

Methods/README.md

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 # Methods
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+Methods are segments of code that perform a specific task. This module teaches you how to define methods in your programs and uses the autograder to test if your methods are working correctly.

README.md

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 Learn computer science and prepare for the AP exam with CodeHS. Check out the course at [CodeHS](https://codehs.com/course/info/apjava) and [read the book](https://codehs.gitbooks.io/apjava/content/) online at GitBook!
 
+The CodeHS AP Java course is a year-long course designed to help students master the basics of Java and equip them to successfully pass the College Board AP Computer Science A Exam at the end of the school year. All learning materials and resources teachers and students need for a successful year-long AP Java course can be found on the [CodeHS](https://codehs.com) website.
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 ### Contributors
 We'd like to thank all those who have helped write this book: