Clarity in School is a K–12 professional learning firm founded by Aaron Heintzman. We connect California schools and districts (and select partners across the United States) directly with nationally published author-consultants who deliver evidence-based professional learning without corporate overhead, account managers, or prescribed vendor formulas. Every engagement is fully customized to your school's specific data, culture, and goals, and built to transfer internal capacity to your team so they can sustain the work without us. Our practice is grounded in John Hattie's Visible Learning research and the broader science of effective instruction.
Our work is concentrated in California, where we have deep experience navigating LCAP funding cycles, Title I accountability demands, and the specific instructional and policy context of California's K-12 system. We also work with school systems in other states on a selective basis. If you're outside California and see strong alignment with what we do, reach out. The conversation about fit is always honest and free.
In education, clarity refers to the degree of shared, precise understanding that exists between teachers, students, and leaders about what learning is happening, why it matters, and what success looks like. When teachers are clear about learning intentions and success criteria, instruction becomes more targeted and effective. When students have clarity about what mastery looks like and how to reach it, they become more active participants in their own learning. John Hattie's Visible Learning research (the most comprehensive synthesis of educational effectiveness research ever conducted) identifies teacher clarity as one of the highest-impact instructional practices available. We named our firm after this idea because we believe clarity is the foundation of everything that actually works in schools. Explore the research at ScienceofClarity.com →
Teacher clarity refers to the precision with which teachers communicate learning intentions, success criteria, and the purpose behind instruction. When students know exactly what they're learning, why it matters, and what mastery looks like, they become more active participants in their own learning. John Hattie's Visible Learning research (the largest educational meta-analysis ever conducted) identifies teacher clarity as one of the highest-impact instructional practices available to any K-12 classroom, with an effect size that consistently outperforms most other interventions. For schools and districts, investing in teacher clarity professional learning is one of the most evidence-backed decisions a leadership team can make. Explore the research at ScienceofClarity.com →
A genuine Professional Learning Community is not a meeting: it's a culture. High-functioning PLCs are built on four essential questions: What do we want students to learn? How will we know when they've learned it? What do we do when they haven't? What do we do when they already have? In practice, this means collaborative teacher teams that study data together, design shared assessments, and hold each other accountable to student outcomes, not just coverage of content. We design and facilitate PLCs grounded in collective efficacy and disciplined inquiry, building the structural norms and habits that make them the engine of continuous school improvement. Not just another box to check.
Effective ELL instruction in California K-12 schools requires both Designated ELD (focused time explicitly developing English language proficiency) and Integrated ELD, where academic language is woven intentionally into all content instruction. We work with teachers and teams to build both frameworks simultaneously, grounding the work in language acquisition research and culturally responsive practice. Given California's extraordinary multilingual student population, ELL instruction isn't a specialty add-on; it's a core instructional competency that every teacher in the state needs to develop. Our work in this area directly supports districts in meeting their LCAP accountability obligations around English learner progress.
Structured literacy is an evidence-based approach to teaching reading that emphasizes explicit, systematic instruction in phonemic awareness, phonics, fluency, vocabulary, and comprehension. The science of reading (decades of cognitive science and neuroscience research) consistently demonstrates that structured literacy approaches are the most effective way to teach all students to read, particularly those who struggle with traditional methods. As schools and districts across California shift their literacy standards and instructional materials to align with this research, they need practical, classroom-ready implementation support, not another theoretical overview. We help K-12 elementary schools move from understanding the science of reading to actually changing daily literacy instruction in every classroom.
Restorative practices are relationship-centered approaches to discipline and community-building that prioritize repairing harm over punishing behavior. In a K-12 context, this means developing the skills and systems for restorative circles, community agreements, proactive relationship-building, and restorative conversations when conflicts arise. Our professional learning in this area isn't about eliminating accountability. It's about building a school culture where accountability is taken seriously because relationships are real. Schools that implement restorative practices with fidelity consistently see reductions in suspensions, measurable improvements in school climate survey data, and stronger student attendance and belonging.
Both, and the entry point usually determines the long-term relationship. We frequently begin with a single school site, prove the value of the work at that level, and then expand into adjacent sites and eventually district-wide partnerships. This approach allows districts to see real results before committing to a broader investment, and it allows us to build genuine relationships with the people doing the work. Whether you're a principal looking for site-specific professional learning support or a district administrator building a district-wide professional learning strategy, we can start exactly where you are.
Every engagement begins with a real listening conversation: we want to understand your current reality, your goals, and what hasn't worked before we propose anything. From there, we design a fully customized professional learning plan aligned to your specific needs, student data, and LCAP or school improvement plan priorities. Engagements vary widely in scope: some are focused workshop series, others are multi-year partnerships with ongoing instructional coaching, data cycles, and leadership development. What stays constant across every engagement is our commitment to documentation, transparency, and building the internal capacity your team needs to sustain the work independently. Start the conversation →
Three things: no prescribed formulas, no corporate overhead, and no dependency model. Large professional learning firms typically assign you a consultant from a fixed roster, deliver a pre-packaged program regardless of your school's context, and structure engagements to keep you coming back indefinitely. We reject all three of those patterns entirely. We listen first, customize everything, and our explicit goal is to build your team's capacity so thoroughly that they eventually don't need us. The author-consultants you work with are nationally published, field-tested practitioners (the same caliber you'd find at any major firm), without the organizational markup baked into your invoice. We're not building dependency. We're building capacity.
Yes: professional development is one of the most commonly funded activities under California's Local Control and Accountability Plan (LCAP). Districts can allocate LCAP funds toward professional learning services, instructional coaching, and consulting when those services align to their identified goals and priorities across the eight state priority areas. We are experienced working within LCAP funding cycles and can help ensure our engagement is structured to satisfy your district's documentation, evidence, and reporting requirements. If you're unsure how to position professional development consulting within your LCAP budget, that's a conversation we can have as part of our initial engagement.
We treat the LCAP as a starting point, not a formality. Before designing any engagement, we review your district's current LCAP goals, identified student outcome priorities, and existing performance data to ensure our work directly addresses what you've committed to your community. This means our professional development isn't generic: it's targeted at the specific instructional gaps, subgroup priorities, and program commitments your LCAP names. We also provide clear, organized documentation of our work and measurable outcomes to support your annual LCAP reporting and any board or community accountability conversations.
Yes. Title I schools represent a significant portion of our work, particularly at the elementary level where federal funding is concentrated and instructional needs are often most acute. We understand the unique pressures Title I schools face: the accountability demands, the resource constraints, the staff turnover, and the sheer urgency of the work when your students can't afford to wait. Our engagement model is designed to deliver high-impact professional learning efficiently and cost-effectively, making it a strong fit for schools that need real, measurable results without wasting a dollar of their categorical budget.
Our work is anchored in John Hattie's Visible Learning research (the most comprehensive meta-analysis of educational effectiveness ever conducted, synthesizing thousands of studies across millions of students worldwide). We also draw heavily from the science of reading (cognitive science and neuroscience research on literacy acquisition), Professional Learning Communities research by DuFour, DuFour, Eaker, and Fullan, and the broader body of evidence on school culture, restorative practices, grading reform, and teacher effectiveness. ScienceofClarity.com is our dedicated research hub, where we've curated and synthesized the evidence base across every domain we work in. It's a useful starting point for anyone who wants to understand the research behind the practice before committing to the work.
ScienceofClarity.com is the research arm of our network, a curated hub where the evidence base behind our professional learning work is made accessible to educators, leaders, and researchers. When we say our work is evidence-based, we mean it literally: every approach we bring into schools is grounded in peer-reviewed research and practical field validation, not consultant opinion or organizational tradition. The Science of Clarity site organizes that evidence by domain (systemic education, goals and motivation, communication, belonging, organizational design, and more), so the why behind the work is always transparent and accessible to anyone who wants to interrogate it. Explore the research →
Let's start an honest conversation about where you are and where you want to be.
