Teaching for Exams? Have fun! - Key-word transformations with a twist

One of the most tricky and challenging parts of the Cambridge First Exam is Use of English part 4. Students always complain about how difficult it is and prefer to skip it rather than taking the bull by the horns.
If you don't know about this part of the exam, here you are the description from the Cambridge English website.

KEY WORD TRANSFORMATION: Each question consists of a sentence followed by a ‘key’ word and a second sentence with a gap in the middle. You have to use this key word to complete the second sentence so that it has a similar meaning to the first sentence.

I do think that students need to learn to face their weaknesses and practice makes perfect. On the other hand, in their shoes, I understand that training for an exam must be boring so I decided to match a fun game with this exercise.

KEY-WORD TRANSFORMATIONS WITH A TWIST

What do you need? Worksheet(s) of Key word transformations 

A spinner board (optional)

A Finger Twister board

KEY OF THE COLOURS (for those who don't have a spinner board)

GREEN - LEFT HAND - THUMB

ORANGE - LEFT HAND - INDEX FINGER

PINK - RIGHT HAND - LITTLE FINGER

BLUE - RIGHT HAND - RING FINGER

RULES

1) Students work in pairs

2) Students in turns rotate the spinner board. The arrow indicates a finger and colored circle. OR Students in turns call out a colour and number.

3) The teacher boards the corresponding transformation.

4) The student needs to answer the question.

4a If the student answers correctly, they don't put any fingers on the board.

4b If the student makes a mistake, they have to put their finger on the corresponding circle according to the spinner/ the number and color they have previously called out.
4c The teacher gives the chance to another student to answer correctly. If they can answer correctly, they take off one of their fingers from the finger twister board.

5) The winner is the student with fewer fingers on the board, that is, the one who has made fewer mistakes.

My students have never had such fun doing this exercise. :)