This is a fully editable Word doc that has a grid of the WTW red book sorts, with the Australian supplement added in. It includes at least 4 spelling focus words for each sort and many of the words come from the 300 instant high frequency words, as listed in the WTW book.
When I assign word sorts to my red group, I like to give them spelling words each week to go along with the sort. Unlike the yellow sorts, you can't give students the actual words for the picture sorts in the red book, as they are learning the sound, not how to spell the word. This prompted me to create a list for each sort that supported the digraph or blend etc that they were learning within that sort. I also thought that using the 300 instant high frequency words would be very beneficial to the students. I then spent literally hours and hours choosing words and making sure I didn't double up too much, but there is a tiny amount of doubles for the whole 50 sorts.
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Please note that this is not suitable for USA teachers, as I have supplemented some sorts with the Australian Supplement for the Words their way red book Australian supplement grid for whole book.