https://www.youtube.com/watch?v=FJcoLFY3YIs
Three-letter consonant blends have three consonants with no vowels separating them. You say the sound of each letter when you pronounce these blends, just like with 2-consonant blends. Learn to read words that have str, spr, spl, and scr.
Chapters:
00:00 scr
01:43 spl
03:23 spr
05:02 str
For a version with more practice reading words: https://youtu.be/U-W3hN1MN-A