Virtual Manipulatives by Toy Theater
These virtual manipulatives by Toy Theater are my latest favorite math find. Reasons I love this site: Simple but elegant design attracts kids but isn't so busy that it is distracting. Each tool also has a description for its instructional use. Some tools list the Common Core standards they could address. (I know, I know...) Many also have a link to even more pedagogy information, related printables, and even videos. The manipulatives include some that are fantastic for early numeracy such as Rekenreks, two-color counters and ten frames. There are even some pretty good math and reading games included on the site. (Although there are more math games than reading at this time.) The makers promise it is free for teachers. Not freemium, free.