Beast Academy

I wanted to second the previous poster as regards AoPS/Beast Academy. Beast Academy is the best $100 I have ever spent. I have paid more than that in total, buying both the paper and the online format for multiple kids over several years. My kids and I both prefer the online format because it also has great videos, and because no one needs to check problem answers. Beast Academy ends with 5th grade material unfortunately, but I can imagine a 6th or 7th grader benefiting a lot from their harder problems, and from the review.  Beast Academy is school curriculum aligned, but it has creative problems, and is not necessarily the best for rote skills, like learning multiplication facts. An app like Kahoot! might be better for that.

The AoPS format for grades 6 and up is not something I would strongly recommend, however. My older kid has been enrolled in AoPS classes, and will likely continue, but these are expensive, and their textbook format is not at all attractive. The games, and many of the videos, end with Beast Academy, for an (advanced) grade 5 student. Many of the AoPS problems for the older grades are available for free on their alcumus website. 

As regards the online stuff you have already tried: I'm also a fan of Khan Academy, and Dreambox. Dreambox is very limited, even though it has some very creative applications, like Algebra 5+ (meaning an introduction to algebra for 5 year olds that actually works!). Khan academy is free and covers a ton of courses across the curriculum at a basic level. I love it for this reason. It is significantly easier than Beast Academy/AoPS. When my older kid trips up on an AoPS class, they go to Khan Academy for a clearer, more basic, explanation.  

That said, all kids, and especially kids with any kind of learning difference, likely benefit more from in person than from online activities. We visited mathnasium, and got their very useful free evaluation. It felt geared towards weaker students in the lower grades. At the center we visited no kids were doing Algebra I or above. My kids loved it and wanted to go back, because there were prizes and easy worksheets, but I wasn't sold, especially since their pricing is around $400 per month (for up to 10 sessions.) 

Firecracker Math, Russian School of Mathematics, Academic Talent Development Program, and Berkeley Math Circle are other in person options perhaps worth exploring. 

Also a huge fan of Beast Academy - we do the synchronous classes with a live instructor.  They go much deeper into the concepts than school math. It does require homework though.

We have used Beast Academy/Art of Problem Solving for the past two years for Math. My kids are entering 6th and 4th. The company does offer local in-person classes and live online classes, but we have exclusively used the asynchronous mode because it gives me the flexiblity to have them use it when we have time for math. We attempt to do the recommended 30 minutes a day, but some days it's a hour and some days it's none at all. I do know they offer summer school in the area too. 

In particular, I've liked it better than other online math programs I've tried because of the reports and sequencing. For example, you can open up all the lessons and let them skip around, or you can force them into a particular learning stream where they have to pass each lesson in order to continue. There are also in-between options where they can start lessons in any order, but cannot jump to a whole different math topic. Also, it sends me very specific reports via email if they are struggling in a particular area. Example: "kid name" is having trouble with Lesson 3.6 Foundations of Long Division... and then it sends instructions on what exactly my kid is doing wrong in the problem and how to help them. There are also physical books in graphic novel format which are included that describe the math, and online videos and readings. 

Both of my kids have improved their math grades to the point that if we have them do the beast academy on the same topics as their school chapters they are coming home with perfect test scores. Feel free to message me if you want more info, but I have no complaints other than I wish there was a beast academy version for their spelling tests! 

Beast Academy is a wonderful resource for a young mathy kid that can read and stay focused. It allows kids to move forward at their own pace, and to be taught through cartoons. The online version is even better in my opinion than the paper version, as the kids can read the cartoons, and watch instructional videos, and get instant feedback on their answers (rather than completing paper worksheets). It costs less than $100. Berkeley Math Circle is also great for abstract concepts, but parent commitment is required (and it typically starts in 1st grade, not K). I have heard great things about the Sankofa principal from multiple sources. And there are parent communities for highly gifted kids that have lots of tips, as it might not be an easy journey even with a particularly flexible public school. 

I wanted to add another recommendation for Beast Academy. They have three options - you can just buy the workbooks (guides, workbooks, and puzzle book), do the online curriculum (has interactive activities) or sign up for their virtual class (a live teacher with a dozen or so students). When you do the last option, you get access to the online curriculum as soon as you sign up (so you could use it and check out if you want to keep it - you can cancel your class until after the second class meeting). We ordered the books and signed up for Math 2c/d for our 2nd grader. She has been doing an in-person pod all year, so this is her only virtual instruction, and she likes it. But we mainly use it to keep her motivated/on track. The real learning comes one-on-one when she does the homework ahead of each class (which isn't pen and paper, but math problems presented in a fun way on-line). We did the workbooks and math problems without the class before it started, and it was less motivating.

All semester last fall, we also benefited from a pedagogically intuitive, kind, smart, amazing math tutor who worked with our daughter one-on-one. He was a freshman at Brown, at home for the semester because it was virtual because of Covid. He charged $20 an hour and came to our house before my daughter's pod school and on days they had off. Since it was such a great price, we had him tutor her like ten hours a week, sometimes more. He built in a lot of breaks (like x number of problems, then a few minutes for legos or dolls), knows what second graders are supposed to be learning (from on-line research), but also talked with his former high school teachers and math olympiad friends about strategies for tutoring. But he's just got a strong sense of how to get others to develop their own math sense, to think flexibly about math. That is a great thing about Beast Academy, too. It's the opposite of just learning to add, subtract, multiply, etc. It forces you to learn different strategies (regrouping, rounding, etc) to get to an answer, so you understand more about the relationships/what's going on with the numbers you're using. Sadly for us and hooray for him, he went back to campus this Spring, so now we're just supplementing the pod with Beast Academy and our own one-on-one work.

I should add that in the interval between the 19 year old math tutor and the Beast Academy class, we did math with our kid and she often got SUPER frustrated, screamed, cried, threw things, hyperventilated, etc. It was the opposite of what we want, which is just for her to like it, be competent at it, and feel confident with it. We realized we weren't building in breaks and were pushing her past the point where she was into it. When problems were easy, it was fine. When anything was hard and we actually had to teach, things went berserk. We did a reset, really clueing in to the signals she gave out, and basically just became Ghandi in terms of our parental patience. The second we lost our capacity to be less than super patient or things got counterproductive, we would stop. Better to stop when you're ahead and finish with good feelings about the subject. Now we've had positive sessions pretty much every time. 

Finally, a friend is also started her first grade daughter (they have different age levels) on Golden Key Russian virtual math classes, which is more about math logic/puzzles.

Hi, we use Beast Academy by Art of Problem Solving. They’re pretty affordable - around $100 - $120 per year and it’s a self guided curriculum for gifted learners. It starts from Grade 2 but seems like your child can give it a try. They have some free lessons to try before buying. It’s got videos, logical puzzles etc and is one of the best math curriculums out there! We love it. Good luck on your search. 

My children use Beast Academy online as enrichment and they like it.  It is a fun program and mixes learning with logic games and problems.   I am also selective about what workbooks I buy for them (looking for ones focusing on logic, reasoning, word problems, etc.)  Singapore Math Challenge series is great.  They are also doing Russian School of Math after school.  For a mathematically advanced kids, most schools will not be able to provide what they need, so after school enrichment activities and online programs are the only way to keep them learning and interested in math. 

Another resource to recommend: the Beast Academy workbooks from Art of Problem Solving.  Our son is in an OUSD school that we love but they just can't differentiate math enough to keep him challenged.  We spend about 30 minutes a day with him working through the Beast Academy books and have found it to be an excellent resource for not just racing him ahead but helping him develop very solid and flexible foundational skills in math.  The graphic novel-style format also keeps him engaged and builds his reading skills.

We love Beast Academy for math and the Horrible Histories books for history. Beast Academy has an online program that starts in 2nd grade and their math curriculum is fabulous. My daughter went from feeling like she was just "OK" at math to being several grades ahead after just 2 years of Beast Academy (https://beastacademy.com/). There is definitely enough challenge for quite advanced kids. The Horrible Histories books are a lot of fun, but I think are probably around a 5th grade reading level, so that might depend on your son. Good luck!