There are 74 cards/slides that can be used to practice the production of s-blend in the medial position of words orally or with reading. They can be used to focus at the word-level or at the sentence level. I made them in keynote (which can be converted to powerpoint or google slides) so that I could print several slides to a page to be the size of smaller cards. They are easy to use with other groups of students at the same time to address other issues such as grammar, vocabulary, describing and answering questions.
I often just use them digitally now though. I will show them in presentation mode on the computer, my ipad or my phone. The kids are highly motivated by them. Even just turning the page is exciting for them!
Also, all of my cards have different colors/themes with a code at the bottom for a quick reference for therapists. These cards are also coded at the bottom left for the specific s blend targeted. I have many sets of cards, so having them coded is key to staying organized. These are great for therapists who have to travel. I keep them in index card plastic boxes and label them with a sharpie. However, nowadays, you might just use them on your device, whatever that may be.