I'm Gabriel, a K–6 math intervention teacher, and I built the first DotSense tool, Subitizing, for myself. I was tired of hunting for number-sense resources that either took forever to prep or turned into a pile of Google Slides I had to rebuild every year. I just wanted something that worked.
Once that first tool existed, I got hooked on making more. A bank of routines I could actually use for teaching math came first; sharing them with other teachers came second. I wasn't trying to build a product to sell. Every tool here exists because I needed it.
I used Subitizing with my 5th grade class last year, and there's a lot more here now that I'm excited to bring into my intervention groups this coming year.
Routines, not manipulatives
DotSense flips that around. Every tool runs a complete instructional routine: Flash, Wait, Ask, Reveal, with the timing, the discussion prompts, and research-based number ranges already built in. You press one button and teach. It's the difference between being handed a pile of base-ten blocks and being handed a lesson.
Research first, always
Nothing here is decorative. Every tool traces back to specific, named research in number sense, fraction learning, or fluency development, not just a general claim of being evidence-based. See the full research behind DotSense →
Built for your classroom, safe for your students
Several tools are free with no login required. The full DotSense Plus suite requires a teacher account. There are no student accounts, ever, and no student data is collected. The tools run entirely in your browser, which keeps them well outside COPPA and FERPA scope. They're designed teacher-facing, for your smartboard, with a dark or light theme and a projection mode that hides the controls.
Get in touch
Questions, ideas, or a routine you wish existed? Email dotsensemath@gmail.com.