Last year, I did a series on teaching the six syllable types. Teaching the six syllable types is a phonics-based approach to teaching decoding and encoding (reading and spelling). Research shows that a phonics-based approach is the best approach for most students, especially those with a specific learning disability in reading (aka dyslexia).
I made this sheet for easy reference. I plan to print and laminate, so my students can refer to it. I can give the cue, “It’s a closed syllable,” and students can refresh their memory. They need, of course, to be thoroughly taught first.