Hello there! Are you an occupational therapist and where are you based? Looking forward to learning from you too! I'm sure this can benefit the parents or planning to be here on hive.😊

For the ch and sh sounds, I use gestural cues (sh- putting my finger to my lips for "be quiet" and ch- holding an imaginary spray) and verbal cues (sh- quiet sound, it is a long sound and ch- spraying sound like you're spraying water on the plant, it is quick and short). We practice imitating and saying it together then I present it using minimal pairs.

I used the Twinkl phonics for my classes since I purchased membership and they have tons of other language activities. I haven't explored Jolly phonics.