1

t, th, d

memory aid: "t" has one downstroke

acrostic: train the dog

2

n

memory aid: two downstrokes

3

m

memory aid: three downstrokes

4

r

memory aid: the last sound for the word four in several languages

5

l

memory aid: Roman numeral for 50 is "L" 

6

j, sh, ch, soft g

acrostic: Jack should chase 6 giants

7

k, q, hard c, hard g

acrostic: 7 kings and queens count gold

8

f, v

memory aid: script f looks like an 8

acrostic: a fun vacation (for 8)

9

p, b

memory aid: "p" is mirror image of 9

acrostic: 9 pretty babies

0

z, s, soft c

memory aid: "z" is for "zero"

acrostic: zero is a cipher 

excluded consonant sounds

w, h, y