I have no direct experience with these programs:

You might want to check into the camps run by Montgomery College.

http://cms.montgomerycollege.edu/wdce/youthcourses/summer_toc.html

It seems to be a program for the school year, but you might check out this math circle.

https://www.american.edu/ucm/news/20180123-math-circle.cfm

It looks like AU might also hold a Julia Robinson math festival in October.

https://edspace.american.edu/dcmathcircle/

http://jrmf.org/about-us/

np -- thanks for the list of math resources to the poster who posted them. I'm saving that for later.

I don't know of camps, but my third graders is enjoying the Beast Academy book series (book with accompanying workbook).

AoPS Academy in Vienna near Tysons has math camps. Their approach is all about the love of problem solving and not at all about drilling math problems.

OP, I know that the location doesn't work for you, but have to second this as a really cool camp for kids who are into Math. My son did it and enjoyed it. The problems were tough and really required some thought. DH and I had to think about some of them when DS brought his work home to show us.

Anonymous wrote:Thanks - any others, perhaps closer to DC?

www.mathtree.com

Mathtree says they have DC camps. I can't vouch for them as we haven't used them but they advertise a lot in this area.

I also second the idea above about checking out Mathnasium. The don't have camps but they do tailor math work to the individual kid and you can pick hours that work for you (within their opening hours). It's one on one tutoring, though--not a camp with math games among groups of kids....They likely would be able to assess your DD's interests and needs (do you want math camp because she's great at it and you want enrichment, or because you want to keep up skills over summer, or because she needs remedial help?). They could then put together a program for her. Quite a few Mathnasiums in the area; not sure about DC per se.

Maybe piece it together with mathnasium every day for a bit or something?

I had a mathy daughter. We never did math camp. I considered the CTY program at one time. It looked good, but my daughter wasn't interested in camp. Here's a link to the course descriptions. I suspect it's too late to apply this year, but it might be helpful in the future. I thought it might also provide some ideas for things you can do at home.

https://cty.jhu.edu/summer/grades2-6/catalog/math.html#numr

Below I've listed some of the things I liked when I was looking for material for my kids.

Links:

National Library of Virtual Manipulatives
http://nlvm.usu.edu/en/nav/vlibrary.html

Hoagies has great links for every area of interest including math:
http://www.hoagiesgifted.org/math.htm
http://www.hoagiesgifted.org/brain_teasers.htm

The Mathemagician - Arthur Benjamin
https://m.youtube.com/watch?v=baxOXLN23GI
He has several videos on youtube. This is one of the longer ones. Your child might provide one of the shorter ones depending on their interest level and patience.

An easy way to multiply large numbers by 11.
https://www.math.hmc.edu/funfacts/ffiles/10001.1.shtml

Problem of the Week:
Saint Ann's School (Does provide answers)
https://sites.google.com/a/saintannsny.org/problem-of-the-week/
Princeton Friends School (Does not come with answers)
https://www.princetonfriendsschool.org/page/problem-of-the-week

Games:

My daughter used to play an online version of the game 24. I think that link doesn't exist anymore, but you could probably find other versions on the web or in an app store. Here's a description of the game:
https://en.m.wikipedia.org/wiki/24_Game

Buzz
Buzz is a verbal math game. A rule (or rules) or established before each round specifying which numbers will be replaced with the word "buzz". Players then take turns counting. If they fail to apply the rule, or apply it incorrectly they're out.
Ex. Even numbers and numbers with 3 in it. (1, buzz, buzz, buzz, 5, buzz, 7, buzz, . . ., 11, buzz, buzz, buzz, 15, . . . 27, buzz, 29, buzz (all 30s will be buzzed)
Other good rules are multiples of x, squares, primes, Fibonacci numbers, etc.

SET is good for finding patterns. It's a card game, but the manufacturer's website has a daily challenge online.
https://www.setgame.com/set/puzzle

My daughter loved strategy games of any sort. (Checkers, Chinese Checkers, Connect 4, Othello, Go, Mancala, Pentago, Chess, etc.)

Sudoku (can find sudoku puzzle books or online puzzles).

Books:
Sideways Arithmetic from Wayside School by Louis Sachar (It is a companion book to a fiction series. In case you haven't read Louis Sachar, you should know that his books are quirky and his math puzzles are as well.)

Theoni Pappas has written a lot of books on math topics. Her Penrose the Cat books are probably the best known. We bought her book "fractals googols and other mathematical tales" and thoroughly enjoyed it.

I think the Sir Cumference books by Cindy Neuschwander are great for introducing geometry concepts. They are picture books.

Hoagies website has lists of books organized by subject:
http://www.hoagiesgifted.org/mathematics.htm
http://www.hoagiesgifted.org/puzzle_books.htm

TV shows:
Cyberchase on PBS (designed for kids)
The Story of Maths on Netflix (not designed for kids)

FYI - In the Spring there is a National Math Festival held every other year. I've never gone. By the time I found out about it, my kids were in high school and too busy to go.

http://www.nationalmathfestival.org

NP here. I'm interested in the home resources!

My mathy dd never did camp, but I can point you towards math resources for home if you like.

Thanks - any others, perhaps closer to DC?

AoPS Academy in Vienna near Tysons has math camps. Their approach is all about the love of problem solving and not at all about drilling math problems.

My daughter really wants to go to a math camp this summer, either a one or two week camp (day camp, not sleepaway). Any still available that you're aware of? There are some that are a bit techy/STEMy, like web design and such, but she's looking for something that is … doing math problems. Thanks!