spelling test term 1 and term 4

Kia ora everyone Today, we sat the Margaret Peters Spelling Test. I scored 39 which gives me a spelling age of 12.3
At the beginning of the year, I scored 40 and had a spelling age of 12.3
So, I improved my spelling age by 0. I stayed at the same spelling age 12.3.
I think I got this result because I got mixed up because I wrote shower which wasn't one of the words in the test.