Here is a list of all of the math skills students learn in junior kindergarten! These skills are organized into categories.

 Count to 3
  A.1 Learn to count - up to 3
  A.2 Count objects - up to 3
  A.3 Count dots - up to 3
  A.4 Count shapes - up to 3
  A.5 Count on ten frames - up to 3
  A.6 Show numbers on ten frames - up to 3
  A.7 Represent numbers - up to 3

Count to 5
  B.1 Learn to count - up to 5
  B.2 Count objects - up to 5
  B.3 Count dots - up to 5
  B.4 Count shapes - up to 5
  B.5 Count on ten frames - up to 5
  B.6 Show numbers on ten frames - up to 5
  B.7 Represent numbers - up to 5

Count to 10
  C.1 Learn to count - up to 10
  C.2 Count objects - up to 10
  C.3 Count dots - up to 10
  C.4 Count shapes - up to 10
  C.5 Count on ten frames - up to 10
  C.6 Show numbers on ten frames - up to 10
  C.7 Represent numbers - up to 10

Count to 20
  D.1 Count objects - up to 20
  D.2 Count dots - up to 20
  D.3 Count shapes - up to 20
  D.4 Count on ten frames - up to 20
  D.5 Show numbers on ten frames - up to 20
  D.6 Represent numbers - up to 20
 
Comparing
  E.1 Are there enough?
  E.2 More
  E.3 Fewer
  E.4 Fewer and more - compare by counting
  E.5 Compare in a mixed group

Positions
  F.1 Inside and outside
  F.2 Above and below
  F.3 Beside and next to
  F.4 Left and right
  F.5 Left, middle and right
  F.6 Top and bottom
  F.7 Top, middle and bottom

Classify
  G.1 Same
  G.2 Different
  G.3 Same and different
  G.4 Classify shapes by colour
  G.5 Classify and sort by colour
  G.6 Classify and sort by shape

Patterns
  H.1 Colour patterns
  H.2 Size patterns
  H.3 Shape patterns
  H.4 What comes next?
 
Size
  I.1 Long and short
  I.2 Tall and short
  I.3 Light and heavy
  I.4 Holds more or less
  I.5 Wide and narrow
  I.6 Compare size and weight

Flat shapes
  K.1 Name the shape
  K.2 Circles
  K.3 Squares
  K.4 Triangles
  K.5 Rectangles
  K.6 Circles, squares and triangles

Solid shapes
  L.1 Flat and solid shapes
  L.2 Name the solid shape
  L.3 Spheres
  L.4 Cubes
  L.5 Cones
  L.6 Cylinders
  L.7 Select solid shapes

Source : 
https://ca.ixl.com/math/jr-kindergarten