Testing non-verbal students

I have a range of students in my class and my biggest struggle is finding an appropriate and reliable method to test their skills. I have had an influx of new students in my class this term and whenever I get a new student my first question is, "how do I test what they already know?"

In the past I have success with one of my students using an alphabet programme I made on my smart board. However when i tried this method for my three new students I found it was not suitable. They starting popping all of the balloons not just the letter i was calling out. 

This week i have spent some time teaching my new students to "point to" or "give me" a flashcard. This isn't the most reliable method because when they make a choice out of 3 they may accidentally pick the correct card. With this method i will usually retest them multiple times to make sure my data is correct. However testing alphabet and sound knowledge can take a very long time. Most of my students are still learning to attend and sit for extended periods of time which means testing is done in short mini-sessions. 

When researching other appropriate methods i came across a blog that shared the exact sturggles that I have been having with my students. In this blog there were some excellent suggestions for testing phonological awareness. I have a number of students who can identify both upper case, lower case letters and letter sounds but i am unsure if they are able to link this sound awareness to a word.

With the remainder of the term i am going to try assessing their phonological awareness using the testing strategies outlined in the blog (linked above). I am hoping this will give me more insight into their reading skills.