Fix grammatical issues in README.md

I worked on correcting subject-verb agreement, capitalization, punctuation, hyphenation, and errant marks.

README.md

@@ -19,23 +19,23 @@ The first section will teach you the basics of how webpages work and also introd
 
 Skills you'll practice include `HTML, CSS, JavaScript, jQuery` and `Bootstrap`.
 
-To earn this certification you'll build **10 front-end projects** and implement many **JavaScript algorithms**
+To earn this certification, you'll build **10 front-end projects** and implement many **JavaScript algorithms**.
 
 ##### 2. Data Visualization Certification
-The second section builds upon the first and introduce you to more advanced topics such as `Sass, React` and `D3`.
+The second section builds upon the first and introduces you to more advanced topics such as `Sass, React` and `D3`.
 
-To earn this certification you'll build **5 React-apps** and **5 Data visualization apps** using `D3.js`.
+To earn this certification, you'll build **5 React-apps** and **5 Data visualization apps** using `D3.js`.
 
 ##### 3. Back End Certification
-The third section introduces you to back end development using `Node.js, Express, MongoDB` but also teach you about the important concept of source control using `Git`.
+The third section introduces you to back end development using `Node.js, Express,` and `MongoDB`. It also teaches you about the important concept of source control using `Git`.
 
-To earn this certification you'll build **5 API:s** and **5 full stack JavaScript apps**.
+To earn this certification, you'll build **5 APIs** and **5 full stack JavaScript apps**.
 
 ##### 4. Full Stack Certification
-The fourth section is where you'll get **real world experience** by working on projects for **Non-profits**.
-We'll pair you with another camper, an agile project manager, and a stakeholder from a nonprofit organization. Together, you'll plan, build and maintain apps that helps that nonprofit carry out its mission more effectively.
+The fourth section is where you'll get **real-world experience** by working on projects for **nonprofits**.
+We'll pair you with another camper, an agile project manager, and a stakeholder from a nonprofit organization. Together, you'll plan, build and maintain apps that help that nonprofit carry out its mission more effectively.
 
-For this certification you'll work on **two projects from scratch** and then **maintain/upgrade two existing projects**.
+For this certification, you'll work on **two projects from scratch** and then **maintain/upgrade two existing projects**.
 
 ---
 
@@ -54,13 +54,13 @@ Found a bug?
 Do not file an issue until you have followed these steps:
 
 1. Read [Help I've Found a Bug](https://github.com/FreeCodeCamp/FreeCodeCamp/wiki/Help-I've-Found-a-Bug) wiki page and follow the instructions there.
-2. Asked for confirmation in the appropriate [Help Room](https://github.com/FreeCodeCamp/FreeCodeCamp/wiki/Help-Rooms)
+2. Ask for confirmation in the appropriate [Help Room](https://github.com/FreeCodeCamp/FreeCodeCamp/wiki/Help-Rooms).
 3. Please *do not* open an issue without a 3rd party confirmation of your problem.
 
 Contributing
 ------------
 
-We welcome pull requests from Free Code Camp campers (our students) and seasoned JavaScript developers alike! Please, follow [these steps](CONTRIBUTING.md) to contribute.
+We welcome pull requests from Free Code Camp campers (our students) and seasoned JavaScript developers alike! Please follow [these steps](CONTRIBUTING.md) to contribute.
 
 License
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