Enroll in a closer school for Fridays only?

My 7yo child is in School A all week (it's a long commute). I want to pull them out and put them into School B ONE day a week, specifically Fridays because that's a half day at School A and not worth the long commute to school. I have several cultural, language and academic reasons to justify this. 

I don't have a particular School B in mind- seeking somewhere in Oakland/Emeryville/Berkeley that would allow a 1x per week child. I'm assuming it would need to be a Charter or Private or an Extracurricular. It might not even be "school", but it would be justifiable.

Is this technically "home schooling" 1x a week?

I looked into Forest Schools, but they seem to stop at age 6.  

I'm open to 1:1 Activities/Tutoring or Group classes such as Athletic Playground, Swimming lessons, Dance, Music, Math. I'd prefer it's ONE thing and not a collection of programs in an attempt to fill the day. 

Where are there activities for 7yo's 1x week, during the school day? I have minimal ideas on where to start.