kindergarten-garden: grammatical improvements to description.md (#948)

* kindergarten-garden: fix minor grammatical errors

* Further changes to Description.md

This commit contains requested changes to original commit as well as some other changes that I felt needed to be made.

* A couple more updates

Changes made based on feedback

exercises/kindergarten-garden/description.md

@@ -1,19 +1,19 @@
 Given a diagram, determine which plants each child in the kindergarten class is
 responsible for.
 
-The kindergarten class is learning about growing plants. The teachers
+The kindergarten class is learning about growing plants. The teacher
 thought it would be a good idea to give them actual seeds, plant them in
 actual dirt, and grow actual plants.
 
 They've chosen to grow grass, clover, radishes, and violets.
 
-To this end, they've put little styrofoam cups along the window sills,
-and planted one type of plant in each cup, choosing randomly from the
-available types of seeds.
+To this end, the children have put little cups along the window sills, and 
+planted one type of plant in each cup, choosing randomly from the available 
+types of seeds.
 
 ```text
 [window][window][window]
-........................ # each dot represents a styrofoam cup
+........................ # each dot represents a cup
 ........................
 ```
 
@@ -23,8 +23,8 @@ There are 12 children in the class:
 - Eve, Fred, Ginny, Harriet,
 - Ileana, Joseph, Kincaid, and Larry.
 
-Each child gets 4 cups, two on each row. The children are assigned to
-cups in alphabetical order.
+Each child gets 4 cups, two on each row. Their teacher assigns cups to 
+the children alphabetically by their names.
 
 The following diagram represents Alice's plants:
 
@@ -34,12 +34,12 @@ VR......................
 RG......................
 ```
 
-So in the row nearest the window, she has a violet and a radish; in the
-row behind that, she has a radish and some grass.
+In the first row, nearest the windows, she has a violet and a radish.  In the
+second row she has a radish and some grass.
 
 Your program will be given the plants from left-to-right starting with
 the row nearest the windows. From this, it should be able to determine
-which plants belong to which students.
+which plants belong to each student.
 
 For example, if it's told that the garden looks like so: