The best spelling app for intervention and RTI (2026)
Full disclosure: I make Spelling Test Buddy, and a lot of intervention teachers use it. But intervention is where I’d be most careful about letting an app do the teaching. The best app for intervention is the one that supports the explicit instruction you’re already giving.
| Tool | Best for | Price | Teaches, or practices? |
|---|---|---|---|
| Spelling Test Buddy (mine) | adaptive practice and progress data for small groups | $49.99/year, up to 150 students | Practices and tests; includes a K-8 spelling curriculum |
| UFLI Foundations | explicit, systematic phonics instruction | Free online toolbox; manual sold separately | Teaches |
| Nessy Reading and Spelling | self-paced digital program for dyslexic students | Home plans from $15.50/month; school pricing by quote | Teaches and practices |
| Barton Reading and Spelling | one-on-one Orton-Gillingham tutoring | Sold by level | Teaches |
| Spelling Shed | sequenced practice with motivating games | Free plan; Premium by quote | Practices, with a scheme |
The app is the practice, not the intervention
The research on intervention is consistent: struggling spellers need explicit, systematic instruction in how sounds map to letters and how words are built, and then a lot of practice. Apps are great at the second part: lots of practice, no judgment, instant feedback, and data. None of them, including mine, should replace the first.
So the useful question isn’t “which app is best?” It’s “what program am I teaching from, and which tool gives my students the most useful practice on it?” I wrote more about this in five common strategies for intervention specialists and maximizing RTI success with digital tools.
1. Spelling Test Buddymine
Mine. Intervention is where the Adaptive Learning Programs earn their keep. Each student gets daily practice built from the words they miss, using spaced repetition, so a student who has mastered short-a words doesn’t spend time on them while another student keeps seeing them.
Make lists from your program’s words, a phonics pattern, or 850+ pre-made lists. Put each intervention group on its own list. Digital Sorts give students pattern sorting practice, and Teach Me walks through a word before they’re tested on it. Worksheet Creator makes UFLI-inspired Roll and Read sheets, sorts, and word matrices for the table. Every result is saved per student and exports to PDF or CSV for your data meetings.
What it won’t do: deliver explicit instruction. It also isn’t a normed screener.
2. UFLI Foundations
If you need a program to teach from, UFLI Foundations is widely used, research-based, and its online toolbox is free. It’s instruction, not an app, but most of my intervention teachers who use it pair its lesson words with a practice tool.
3. Nessy Reading and Spelling
Nessy is built around the needs of students with dyslexia: structured, multisensory lessons, games, and a self-paced sequence. If a student needs a digital program that actually teaches, not just practice on your lists, Nessy does more of the teaching than Spelling Test Buddy does.
4. Barton Reading and Spelling System
For a student who needs intensive one-on-one work, Barton is a well-known, scripted OG program that a tutor or trained parent can deliver. It’s a big commitment, and for the right student, it’s the right one.
5. Spelling Shed
If your intervention students are in elementary school and motivation is the problem, Spelling Shed’s games and leagues help, and its scheme gives you a sequence. Spelling Test Buddy vs Spelling Shed.
My pick
You have a program and need practice and data: Spelling Test Buddy, with each group on its own list and adaptive programs for students who need more repetition.
You need a program: UFLI Foundations for foundational skills, or Barton for one-on-one OG work.
A student needs a digital program that teaches: Nessy.
What I’d do this week
- For each intervention group, write down the one pattern they're working on. If you can't name it, start there.
- Put that pattern's words into whatever practice tool you use, one list per group.
- Give a short weekly check on those words and save the results per student. That's your progress-monitoring trail.
- Move students to an adaptive program when they need more exposures than the group does.
Questions
- Can Spelling Test Buddy be used for progress monitoring?
- Yes. Every test result is saved per student, and you can export results as PDF or CSV for RTI or MTSS meetings. It isn’t a standardized, normed progress-monitoring assessment, so use it alongside whatever your district requires.
- How does spaced repetition help in intervention?
- Students in intervention often need many more exposures to a pattern before it sticks. Spaced repetition brings each missed word back at increasing intervals until the student spells it correctly several times, so practice time goes to the words that student still needs.
- Can I make lists by spelling pattern or phoneme?
- Yes. You can generate a list from a phonics pattern, choose from 850+ pre-made lists organized by pattern, or enter your program’s words directly.
- Does it work with UFLI?
- Yes. Teachers enter each UFLI lesson’s words, and Worksheet Creator has UFLI-inspired Roll and Read and Read, Sort, Write templates.
Try Spelling Test Buddy
$49.99 a year for up to 150 students, with every game, tool, and report included. Start with a 14-day free trial, and if 14 days isn’t enough, email me and I’ll extend it.
Start your free trialI checked prices and features for every product on this page in October 2026. Prices change, so confirm on each company’s site before you buy.