I'm a Maths teacher in primary school and I love to use amigurumi to teach. :) These are the 6 characters I've invented and crocheted for my class.

I know I can't win in the Amigurumi contest because I live in Italy, but I want to enter just because I like to take part in it and I like to have my works be listed with similar ones.

I love to do amigurumi, I'm kind addicted.

I use these amigurumi to teach Maths, and other subjects.

"Tailchaser goes to the markets and buys 4 red apples and 5 yellow apples. How many apple he buys?"
This is more interesting, for my pupils, than if I wrote it with "mother", "uncle" or "Miss white".

Step 1: Basic Shape: Feet & Legs

I won't tell you the colours in this pattern, because you should use what you need.

sc = single crochet
inc = increasing sc
dec = decreasing sc
sl = slip stitch

Feet (make 2)
In a magic ring:
5 sc (5)
5 inc (10)
*1 inc 1 sc** 5 time (15)
*1 inc 2 sc** 5 time (20)
*1 inc 3 sc** 5 time (25)
*1 inc 4 sc** 5 time (30)
30 sc (30) for 4 rounds
*1 dec 4 sc** 5 time (25)
*1 dec 3 sc** 5 time (20)
Stuff
*1 dec 2 sc** 5 time (15)
*1 dec 1 sc** 5 time (10)
5 dec (5)
Fasten off and sew the hole.

Legs (make 2)
with blue (or red/fuxia/light blue/gray.... for T'Pol; white for Phlox)
16 ch
join with a slip stitch
16 sc for 20 rounds (or until you are satisfied with the length).
Sew to the foot.
Stuff legs.

Step 2: Basic Shape: Body

In a magic ring:
6 sc
6 inc
*1 inc 1 sc** 6 times (18)
*1 inc 2 sc** 6 times (24)
*1 inc 3 sc** 6 times (30)
*1 inc 4 sc** 6 times (36)
*1 inc 5 sc** 6 times (42)
*1 inc 6 sc** 6 times (48)
*1 inc 7 sc** 6 times (54)
Work even 54 sc for 4 rounds.
*1 dec 7 sc** 6 times (48)
Work even 48 sc for 2 rounds.
*1 dec 6 sc** 6 times (42)
Work even 42 sc for 1 rounds.
*1 dec 5 sc** 6 times (36)
Work even 36 sc for 2 rounds.
*1 dec 2 sc** 9 times (27)
Work even 27sc for 1 rounds.
Stuff
*1 dec 1 sc** 9 times (18)
Work even 18 sc for 1 rounds.
9 dec (9)
Work even 9 sc for 1 rounds.

You'll a have a big hole at the top of the body where you'll sew the head.

Step 3: Basic Shape: Arms, Muzzle, Eyes, Tail and Ears

Arms:
In a magic ring:
6 sc (6)
6 inc (12)
*1 inc 2 sc** 4 times (16)
Work even 16 sc for 3 rounds.
*1 dec 2 sc** 4 times (12)
Work even 12 sc for 10 round (or as long as you want to be the arms).

Muzzle:
In a magic ring:
7 sc (7)
7 inc (14)
Work evenly 14 sc for 7 rounds.
Stuff.
7 dec (7)
fasten off.
Leave a long tail to sew the hole.

Eyes:
In a magic ring:
3 hdc; 1 dc; 3 hdc; 1 dc; close with sl.
Embroid the pupil.

Tail:
In a magic ring:
5 sc (5)
5 inc (10)
*1 inc 1 sc** 5 times (15)
Work evenly 15 sc until you reach the lenght desired (I use more or less 20 rounds).
Fasten off and leave a tail to sew.

Ears:
In a magic ring:
4 sc (4)
*1 inc 1 sc** 2 times (6)
*1 inc 2 sc** 2 times (8)
*1 inc 3 sc** 2 times (10)
*1 inc 4 sc** 2 times (12)
*1 inc 5 sc** 2 times (14)
*1 inc 6 sc** 2 times (16)
*1 inc 7 sc** 2 times (18)
(You can go on like this until you're satisfied with the size.)
Fasten off and leave a long tail to sew to the head.

Step 4: Basic Shape: Head

Head:
in a magic ring:
6 sc (6)
6 inc (12)
*1 inc 1 sc** for 6 times (18)
*1 inc 2 sc** for 6 times (24)
*1 inc 3 sc** for 6 times (30)
*1 inc 4 sc** for 6 times (36)
*1 inc 5 sc** for 6 times (42)
*1 inc 6 sc** for 6 times (48)
*1 inc 7 sc** for 6 times (54)
*1 inc 8 sc** for 6 times (60)
Work evenly 60 for 5 rounds.
*1 dec 8 sc** for 6 times (54)
*1 dec 7 sc** for 6 times (48)
*1 dec 6 sc** for 6 times (42)
*1 dec 5 sc** for 6 times (36)
*1 dec 4 sc** for 6 times (30)
*1 dec 3 sc** for 6 times (24)
Stuff.
*1 dec 2 sc** for 6 times (18)
*1 dec 1 sc** for 6 times (12)
6 dec (6)

You'll have a little hole that will be sewed over the hole on the top of the body.

Step 5: Personalize Them

Embroid the vertical pupils on the cat eyes, the nose and the mouth. You can embroid the pink in the ears or you can crochet with pink yarn when you're making them, just change colour when you crochet the "sc" (the ones between the inc) on one side only.

Sew the legs in front of the body if you want the amigurumi to stay sit down; under the body if you want them to stand up.

I've made bigger foot, muzzle and ears for Lupo Lupone (the wolf); trumpet-like ears for Pino:

Ears (Pino the little Alien)
in a magic ring:
4 sc (4)
work evenly 4 sc for 3 rounds;
4 inc (8)
*1 inc 1 sc** for 4 times (12);
*1 inc 2 sc** for 4 times (16).
Fasten off and weave in tails.

Eyes (Pino & Lupo Lupone):
in a magic ring:
6 sc (6)
6 inc (12)
Fasten off and embroid the reflection woth white.

Clothes:
Use the same pattern of the parts of the body, just use a bigger crochet and/or bigger yarn (or do one more "inc" round).

For Roofshadow, I made a partially sewed dress, but I've changed it recently with a totally crocheted green dress.