For ASL, we just sign all the time. I'm nearly fluent so we just include it in our day. We used Signing Time a lot when she was 2 and 3, but not as much anymore. I still love it and recommend it to everyone! She just knows pretty much all the signs taught in the series so it's mostly just entertainment now.
For Spanish, right now we just use Little Pim. I'm still looking for what to use next. I want something a little more focused and intentional.
We use almost exactly the same curriculum! Love Handwriting without tears and explode the code, etc. that you mentioned. What do you use for your ASL and Spanish curriculum?
We'll be starting K this coming school year. We'll be using:
Singapore math and maybe miquon as well
Handwriting without tears
Building thinking skills from critical thinking co.
Hooked on phonics, reading eggs and explode the code online for now. I'm not sure what we're moving to when she finishes those, likely this year.
For science I'm deciding between 1)noeo physics, 2) SL science A, and 3)DK first encyclopedias and some experiment kits. I'm leaning to 3 because it's what we're doing now and she loves it.
We also do ASL and Spanish.
There are so many good curriculum out there and many people just pick and choose.
We really wanted to focus of independent learning and the basics of reading, writing and math.
We used and are using The Robinson Curriculum. It worked for us.