fixed some typos and minor grammatical changes

foundations/01-css-methods/README.md

@@ -1,5 +1,5 @@
 # Methods for Adding CSS
-In this exerrcise, you're going to practice adding CSS to an HTML file using all three methods: external CSS, internal CSS, and inline CSS. You should only be using type selectors for this exercise when adding styles via the external and internal methods. You should also use keywords for colors (e.g. "blue" instead of using RGB or HEX values).
+In this exercise, you're going to practice adding CSS to an HTML file using all three methods: external CSS, internal CSS, and inline CSS. You should only be using type selectors for this exercise when adding styles via the external and internal methods. You should also use keywords for colors (e.g. "blue" instead of using RGB or HEX values).
 
 There are three elements for you to add styles to, each of which uses a different method of adding CSS to it, as noted in the outcome image below. All other exercises in this section will have a CSS file provided and linked for you, but for this exercise you will have to create the file and link it in the HTML file yourself. This is all about practicing using these different methods and getting the syntax right.
 

foundations/02-class-id-selectors/README.md

@@ -1,7 +1,7 @@
 # Class and ID Selectors
 Knowing how to add class and ID attributes to HTML elements, as well as use their respective selectors, is invaluable, and it's important to practice using them.
 
-There are several elements in the HTMl file provided, which you will have to add either class or ID attributes to as noted in the outcome image below. You will then have to add rules in the CSS file provided using the correct selector syntax. Look over the outcome image carefully, and try to keep in mind what elements look similarly styled (classes), which ones may be completely unique from the rest (ID), and which ones have slight variations from others (multiple classes).
+There are several elements in the HTML file provided, which you will have to add either class or ID attributes to as noted in the outcome image below. You will then have to add rules in the CSS file provided using the correct selector syntax. Look over the outcome image carefully, and try to keep in mind what elements look similarly styled (classes), which ones may be completely unique from the rest (ID), and which ones have slight variations from others (multiple classes).
 
 It isn't entirely important what class or ID values you use, as the focus here is being able to add the attributes and use the correct selector syntax to style elements. For the colors in this exercise, try using a non-keyword value (RGB, HEX, or HSL). The properties you need to add to each element are:
 

foundations/04-chaining-selectors/README.md

@@ -2,9 +2,9 @@
 
 Credits for the images in this exercise go to [Katho Mutodo](https://www.pexels.com/@photobykatho?utm_content=attributionCopyText&utm_medium=referral&utm_source=pexels) and [Andrea Piacquadio](https://www.pexels.com/@olly?utm_content=attributionCopyText&utm_medium=referral&utm_source=pexels).
 
-With this exercise we've provided you a completed HTML file, so you will only have to edit the CSS file. It's more important to understanding how chaining different selectors works for this exercise than actually adding the attributes.
+With this exercise, we've provided you a completed HTML file, so you will only have to edit the CSS file. It's more important to understanding how chaining different selectors works for this exercise than actually adding the attributes.
 
-We have two images for you to style, each with two class names where one of the class names is shared. The goal here is to chain the selectors for both elements so that each have a unique style applied despite using a shared class selector. In other words, you want an element that has both X and Y to have one set of styles, while an element with X and Z has a completely different set of styles. We included the original images as well so that you can see how the styles you will be adding look in comparison, so do not add any styles to them.
+We have two images for you to style, each with two class names, where one of the class names is shared. The goal here is to chain the selectors for both elements so that each have a unique style applied despite using a shared class selector. In other words, you want an element that has both X and Y to have one set of styles, while an element with X and Z has a completely different set of styles. We included the original images as well so that you can see how the styles you will be adding look in comparison, so do not add any styles to them.
 
 The properties you need to add to each element are:
 

foundations/06-cascade-fix/README.md

@@ -1,11 +1,11 @@
 # CSS Methods
-This final exercise for CSS Foundations is going to give you a closer look at the cascade, specificity and rule order in particular. Both the HTMl and CSS files are filled out for you, so instead of adding rules yourself you will simply be editing what is provided.
+This final exercise for CSS Foundations is going to give you a closer look at the cascade, specificity and rule order in particular. Both the HTML and CSS files are filled out for you, so instead of adding rules yourself, you will simply be editing what is provided.
 
-There are a few elements that have some sort of specificity or rule order issue in the provided CSS file. It's up to you to figure out what issue is affecting an element, and how to fix it. You can edit the CSS file by adding or removing selectors or moving stuff around, but you should not edit the HTML file or any of of the actual style declarations in the CSS.
+There are a few elements that have some sort of specificity or rule order issue in the provided CSS file. It's up to you to figure out what issue is affecting an element, and how to fix it. You can edit the CSS file by adding or removing selectors or moving stuff around, but you should not edit the HTML file or any of the actual style declarations in the CSS.
 
 There are multiple ways to solve this exercise, and we did our best to include all of the possible solutions for each element.
 
-Issues with the cascade can be the bane for many when it comes to CSS, and while you won't be an expert from this exercise alone and there are other ways to deal with these issues, it is still super helpful to see how these issues affect our final styles and why its important to order rules carefully.
+Issues with the cascade can be the bane for many when it comes to CSS, and while you won't be an expert from this exercise alone and there are other ways to deal with these issues, it is still super helpful to see how these issues affect our final styles and why it's important to order rules carefully.
 
 ## Desired Outcome
 ![outcome](https://user-images.githubusercontent.com/70952936/131411210-47ff21dd-6d0c-4a7f-b6b1-1ec40f93dd8c.jpg)