Fixation
Fixative mechanisms, preanalytics, specimen thickness, artifacts, downstream testing, safety, and QC.
10 questionsDownloads
Free HT and HTL exam preparation
Learn histology from specimen to stained slide
Structured lessons connect exam concepts with real bench decisions, common artifacts, controls, and troubleshooting. Study at your own pace and keep the printable resources.
7 complete modules70+ practice questionsSix-week study planPrintable resources
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Independent educational resource. Not affiliated with or endorsed by ASCP or the ASCP Board of Certification.
Use the current official exam content guideline. Examination outlines and eligibility requirements can change. This site is a study companion, not a replacement for ASCP BOC examination resources or your laboratory SOPs.
Curriculum
Core study modules
Start in order for a complete review, or open the area you need most.
Processing & Decalcification
Dehydration, clearing, infiltration, schedule design, reagent rotation, decalcification, and troubleshooting.
10 questions3 new PDFs
Embedding & Microtomy
Orientation, paraffin blocks, microtome controls, cryostat technique, artifacts, contamination, and safety.
10 questions5 downloads
Routine H&E
Hematoxylin chemistry, differentiation, bluing, eosin control, stain balance, artifacts, and QC.
10 questionsComplete module
Special Stains
High-yield targets, chemistry, expected colors, controls, differentiation, false results, and troubleshooting.
10 questionsComplete module
Laboratory Operations
Quality systems, equipment, safety hierarchy, validation, traceability, investigations, CAPA, and documentation.
10 questionsComplete module
IHC & ISH Fundamentals
Preanalytics, control strategy, retrieval, detection, ISH, optimization, validation, lot bridging, and troubleshooting.
10 questionsHTL depth
Cumulative Practice
Mixed questions across the full workflow with immediate explanations and a locally saved missed-question log.
8 mixed questions
Six-Week Study Plan
A practical schedule with browser-saved checklists, module order, weekly tasks, and exam-week review guidance.
Self-pacedProgress checks
How the guides work
Learn → apply → check
Learn the mechanism
Understand why a reagent, temperature, tissue orientation, or control changes the result.
Apply it to the bench
Use tables and artifact patterns to connect the concept with a real specimen or workflow.
Check your reasoning
Grade original practice questions and review the explanation—not only the correct letter.
Printable resources
Bench-ready downloads
Use these as study aids and templates. Adapt them to your validated laboratory procedures.
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NMHTL(ASCP)cm
Created by
Natnale Mengesha, HTL(ASCP)cm
A working histotechnologist and molecular pathology scientist with experience in routine histology, IHC, ISH, multiplex tissue imaging, digital pathology, and laboratory troubleshooting.
Natnale is currently engaged in part-time graduate study in Pathology Laboratory Sciences at Boston University. Free HTL Guide combines professional experience with continued study while remaining transparent about its independent, non-official role.
Professional credentialHTL(ASCP)cm
Educational approachMechanisms, artifacts, controls, and reasoning
Correction pathwayDedicated error-reporting and contact options
Molecular pathologyIHC and ISHDigital pathologyGraduate study in progress