Cleaned up formatting and refrences for matrix and kgg.

Author: BethanyG

exercises/practice/kindergarten-garden/.docs/instructions.append.md

@@ -1,26 +1,27 @@
 # Instructions append
 
-## Python Implementation
+## How this exercise is structured on the Python track
 
-The tests for this exercise expect your program to be implemented as a Garden `class` in Python.
-If you are unfamiliar with classes in Python, [classes][classes in python] from the Python docs is a good place to start.
+The tests for this exercise expect your program to be implemented as a Garden [`class`][classes in python] (_see also [concept:python/classes]()_).
+If you are unfamiliar with classes in Python, this [Real Python tutorial][how-to-make-a-class] could be a good additional place to start.
+
+Your `class` should implement a [`method`][methods] called `plants`, which takes a student's name as an argument and returns the `list` of plant names belonging to that student.
 
-Your `class` should implement a `method` called plants, which takes a student's name as an argument and returns the `list` of plant names belonging to that student.
 
 ## Constructors
 
-Creating the example garden
+Creating the example garden:
 
-```
+```python
 [window][window][window]
 VRCGVVRVCGGCCGVRGCVCGCGV
 VRCCCGCRRGVCGCRVVCVGCGCV
 ```
 
 would, in the tests, be represented as `Garden("VRCGVVRVCGGCCGVRGCVCGCGV\nVRCCCGCRRGVCGCRVVCVGCGCV")`.
 
-To make this representation work, your `class` will need to implement an `__init__()` method.
-If you're not familiar with `__init__()` or _constructors_, [class and instance objects][class vs instance objects in python] from the Python docs gives a more detailed explanation.
+To make this representation work, your `class` will need to implement an [`__init__()`][init] [special method][special-methods].
+If you're not familiar with `__init__()` or [_constructors_][what-is-a-constructor], [class and instance objects][class vs instance objects in python] from the Python docs gives a more detailed explanation.
 
 
 ## Default Parameters
@@ -29,6 +30,7 @@ In some tests, a `list` of students is passed as an argument to `__init__()`.
 This should override the twelve student roster provided in the problem statement.
 Both of these statements need to work with your `__init__()` method:
 
+
 ```Python
 # Make a garden based on the default 12-student roster.
 Garden("VRCGVVRVCGGCCGVRGCVCGCGV\nVRCCCGCRRGVCGCRVVCVGCGCV") 
@@ -37,11 +39,15 @@ Garden("VRCGVVRVCGGCCGVRGCVCGCGV\nVRCCCGCRRGVCGCRVVCVGCGCV")
 Garden("VRCC\nVCGG", students=["Valorie", "Raven"]) 
 ```
 
-
 One approach is to make the student `list` a [default argument][default argument values]; the Python docs describe `default parameters` in depth while explaining [function definitions][function definitions].
 
 
-[classes in python]: https://docs.python.org/3/tutorial/classes.html
 [class vs instance objects in python]: https://docs.python.org/3/tutorial/classes.html#class-objects
+[classes in python]: https://docs.python.org/3/tutorial/classes.html#a-first-look-at-classes
 [default argument values]: https://docs.python.org/3/tutorial/controlflow.html#default-argument-values
 [function definitions]: https://docs.python.org/3/reference/compound_stmts.html#function-definitions
+[how-to-make-a-class]: https://realpython.com/python3-object-oriented-programming/#how-to-define-a-class-in-python
+[init]: https://docs.python.org/3/reference/datamodel.html#object.__init__
+[methods]: https://docs.python.org/3/tutorial/classes.html#class-definition-syntax
+[special-methods]: https://docs.python.org/3.11/reference/datamodel.html#special-method-names
+[what-is-a-constructor]: https://en.wikipedia.org/wiki/Constructor_(object-oriented_programming)

exercises/practice/matrix/.docs/instructions.append.md

@@ -1,7 +1,15 @@
 # Instructions append
 
-In this exercise you're going to create a **class**.  _Don't worry, it's not as complicated as you think!_ 
+## How this exercise is structured on the Python track
+
+The tests for this exercise expect you to create a Matrix [`class`][classes] (_see also [concept:python/classes]()_).
+This is different from _using_ a Matrix object from a third-party library such as [Numpy][numpy-matrix], which is not supported.
+ _Don't worry, it's not as complicated as you think!_
+ For more starting points and details on `classes` and data structures, take a look at the resources below:
+
 
 -   [**A First Look at Classes**](https://docs.python.org/3/tutorial/classes.html#a-first-look-at-classes) from the Python 3 documentation. 
 -   [**How to Define a Class in Python**](https://realpython.com/python3-object-oriented-programming/#how-to-define-a-class-in-python) from the Real Python website.  
 -   [**Data Structures in Python**](https://docs.python.org/3/tutorial/datastructures.html) from the Python 3 documentation.
+
+[numpy-matrix]: https://numpy.org/doc/stable/reference/generated/numpy.matrix.html