Update old links

Author: rowanajmarshall

html/lesson6/tutorial.md

@@ -165,5 +165,5 @@ Some of your users might be using screenreaders or keyboards to navigate across
 - The [A11Y Project](https://a11yproject.com/) is an open source project on providing the most up to date and easy to access information regarding accessibility.
 
 #### These extensions are handy if you wish to check if your website meets the criteria and areas to improve:
-- Chrome: WAVE Evaluation Tool
+- Chrome: [WAVE Evaluation Tool](https://chrome.google.com/webstore/detail/wave-evaluation-tool/jbbplnpkjmmeebjpijfedlgcdilocofh)
 - Firefox:[AInspector](https://addons.mozilla.org/en-US/firefox/addon/ainspector-sidebar/)

html/lesson7/tutorial.md

@@ -195,7 +195,7 @@ Have a go at styling these up, you can compare yours with the below example.
         color: white;
     }
 
-Look at your changes in Chrome (Chrome has some great developer tools which are going to help your responsive design). Open up the chrome inspect tool by right clicking and choosing 'inspect'. In the top left hand corner of the inspect tool you should see an icon that looks like a mobile in front of a monitor
+Look at your changes in Chrome (Chrome has some great developer tools which are going to help your responsive design). Open up the Chrome Inspect Tool by right clicking and choosing 'Inspect'. In the top left hand corner of the inspect tool you should see an icon that looks like a mobile in front of a monitor
 
 <img src="images/inspect.png" alt="inspect tool">
 

python/lesson0/tutorial.md

@@ -30,7 +30,7 @@ outdated these days, so we need to upgrade:
    the Free software license as well as enter your administrator password. Just
    follow the prompts and you'll be fine.
 
-If you get lost, have a look at this [tutorial with pictures on DiveIntoPython3](http://www.diveintopython3.net/installing-python.html#macosx).
+If you get lost, have a look at this [tutorial with pictures on DiveIntoPython3](https://diveintopython3.problemsolving.io/installing-python.html#macosx).
 
 ### Windows:
 
@@ -44,7 +44,7 @@ If you get lost, have a look at this [tutorial with pictures on DiveIntoPython3]
 5. Scroll down to the bottom and choose to *Add python.exe to PATH*.
 6. Continue clicking *Next* until it's installed.
 
-If you get lost, have a look at this [tutorial with pictures on DiveIntoPython3](http://www.diveintopython3.net/installing-python.html#windows).
+If you get lost, have a look at this [tutorial with pictures on DiveIntoPython3](https://diveintopython3.problemsolving.io/installing-python.html#windows).
 
 ### Linux
 
@@ -70,7 +70,7 @@ have to use the `scl` workaround:
 4. Run `scn enable python3 /bin/bash`.  This will put you into a shell that
    supports Python 3.
 
-For more information on this process, take a look at [this tutorial](https://devops.profitbricks.com/tutorials/install-python-3-in-centos-7/).
+For more information on this process, take a look at [this tutorial](https://devops.ionos.com/tutorials/install-python-3-on-centos-7.html).
 
 #### Arch