This is the first pattern to use the throw 1, which is a quick pass to the other hand (see Lesson 6 for explanation on siteswaps).
Step 1 Practice the quick pass. You need to be able do this without looking.
Step 2 A two ball excercise. Learn both sides.
Step 3 Juggle one cycle of 441 and stop. First learn starting with one hand, then learn the other side.
Step 4 Two cycles of 441. Learn both sides as before.
Step 5 You are done.
Variant Siteswap 441 can be mixed freely with cascade (and many other patterns). This symmetric variant is siteswap 44133.