A
API Key — Authentication key for Studeia public API. Generated at /institution/settings/api-keys, format mia_ + 40 hex chars. Stored as SHA-256 hash, never exposed after creation.
AGS (Assignment and Grade Service) — LTI 1.3 service allowing tools (like Studeia) to send grades back to LMS consumer (Canvas, Moodle, Blackboard).
Avatar (AI tutor) — Real-time talking avatar (video + TTS voice, live lip-sync) for the AI tutor, opt-in per course via HeyGen LiveAvatar or D-ID with the institution's own (BYO) key. The master key stays server-side. Learn more.
B
Badge — Achievement marker. Studeia uses Open Badges 3.0 (W3C Verifiable Credential). Can be earned automatically (11 criteria) or manual (teacher award).
BBB (BigBlueButton) — Open-source educational videoconferencing platform. Studeia integrates as default video provider via iframe embed.
BNCC — Brazilian National Common Curricular Base. Studeia has basic support (tags per BNCC skill).
C
Canvas LMS — Dominant LMS in US universities (Instructure). Studeia works as LTI 1.3 tool in Canvas.
Chunking — Division of long text into smaller segments for embedding and retrieval. Studeia uses 800 tokens with 200 overlap.
Circuit Breaker — Resilience pattern that skips external provider when it fails repeatedly. Studeia uses for LLM fallback chain.
Concept Mastery — Bayesian probability (Beta distribution) of student mastering a specific concept. Calculated by ConceptMasteryEngine via interactions.
Cronbach's alpha — Internal consistency coefficient of a quiz/assessment. Indicates if questions measure same construct. > 0.7 acceptable. Studeia calculates automatically.
D
DPA (Data Processing Agreement) — GDPR/LGPD contract defining personal data processing responsibilities. Studeia offers standard DPA for Enterprise customers.
Distractor Analysis — In multiple-choice quiz, analyzes which wrong option is most chosen — clue to common misconception.
E
EAD (Educação a Distância) — Brazilian term for online learning/e-learning.
Embedding — Vector representation of text (1024 dimensions in Studeia, generated via Voyage AI). Enables semantic search by similarity.
Enrollment — Links Student to Course, optionally with ClassGroup. Status: active/completed/paused/cancelled.
EvaluationAgent — Studeia AI agent (Haiku, background, ~$0.001/turn) that classifies student responses in chat and detects misconceptions.
F
Fallback Chain — Ordered sequence of providers to try when primary fails. Studeia LLM fallback: Claude → OpenAI → xAI Grok → Google Gemini.
FAQPage Schema — Schema.org JSON-LD for FAQs. Structures Q&A for discovery by LLMs and Google AI Overviews. Studeia generates automatically for every docs page.
G
GDPR — General Data Protection Regulation (Europe). Studeia compliant via Enterprise DPA. European equivalent of LGPD.
Gradebook — Grade book. Studeia: GradeCategory (with weights) > GradeItem > Grade.
Guardian — Legal guardian (parent/tutor). Linked to student via GuardianLink (verified by SMS for LGPD/ECA compliance).
H
Haiku (Claude Haiku) — Fastest and cheapest Claude model. Studeia uses for background tasks.
Hreflang — HTML attribute indicating version in another language of same page. Important for multilingual SEO.
I
IMS Common Cartridge (IMS CC) — Educational content packaging standard. Studeia imports via POST /api/institution/courses/import.
Inline Quiz — Interactive quiz rendered inside AI tutor chat.
Item Difficulty — In test psychometrics, proportion of students who got question right. p < 0.3 = hard; p > 0.85 = easy.
J
JIT Provisioning (Just-In-Time) — Automatic user creation on first SSO login. Studeia does for SAML and OIDC.
JSON-LD — JavaScript Object Notation for Linked Data. W3C schema markup format. Used in Studeia for SEO/GEO and OB 3.0 credentials.
K
Khan Academy — Free educational platform (Khanmigo AI tutor). B2C, focused on own content. Studeia is B2B, focused on institution content.
L
LGPD — Brazilian General Data Protection Law. Studeia native compliance.
LiveClass — Live class. Studeia supports 4 providers: BBB (iframe), Zoom, Teams, Google Meet (all external).
llms.txt — Emerging standard for "robots.txt for LLMs" — markdown file at root indicating what each LLM can crawl + content curation for AI agents.
LLM Router — Studeia internal service that selects provider+model per task type, with automatic fallback and metering.
LMS — Learning Management System. Studeia, Moodle, Canvas, Blackboard, Google Classroom are LMS.
LTI (Learning Tools Interoperability) — 1EdTech standard for integration between LMS and educational tools. LTI 1.3 uses OIDC + JWT. Studeia works as tool provider.
M
Mastery — Domain of a concept or skill. Studeia calculates via ConceptMastery (Bayesian).
Misconception — Student conceptual error. Studeia detects via EvaluationAgent and tracks with lifecycle 3 states: active → resolving → resolved.
Moodle — Most-used open-source LMS in the world.
MRR (Monthly Recurring Revenue) — Key SaaS metric.
Multi-tenant — Architecture where multiple institutions (Tenants) use same platform instance with isolated data.
O
OB 3.0 (Open Badges 3.0) — W3C Verifiable Credential standard for educational credentials.
OIDC (OpenID Connect) — Modern authentication protocol based on OAuth 2.0. Studeia supports for SSO Enterprise.
P
pgvector — PostgreSQL extension to store and search vectors. Studeia uses for RAG (1024 dimensions).
Point-biserial discrimination — Item-total correlation in test psychometrics. > 0.4 is excellent.
PromptTemplate — LLM prompt template stored in database. Customizable per tenantId, taskType, provider, locale, courseId.
Q
QTI (Question and Test Interoperability) — 1EdTech standard for quiz interoperability. Studeia imports QTI 1.2 via IMS CC.
Quarantine (tutor chat) — Temporary restriction of AI tutor use imposed by Supervisor Agent after 3 strikes (LOW/MEDIUM in 7 days). Default 48h.
R
RAG (Retrieval Augmented Generation) — Combines vector search + LLM. Studeia uses per-tenant.
Rate Limit — Limit of calls per period. Studeia: three tiers for public API (1000/5000/custom req/hour) via Redis.
Redis — In-memory database. Studeia uses for cache, queue (BullMQ), leaderboards (ZSET), rate limiting, circuit breaker state, OAuth nonces.
Rubric — Multi-criteria evaluation matrix. Studeia: criteria with weights + levels.
S
SaaS — Software as a Service.
SAML 2.0 — XML-based SSO protocol. Studeia supports SP-initiated and IdP-initiated via node-saml.
SCIM 2.0 — System for Cross-domain Identity Management (RFC 7644). Automatic user/group provisioning via IdP. Studeia: 14 endpoints, encrypted Bearer token.
SCORM — Legacy content packaging standard. Studeia does NOT natively support (only IMS CC).
SRS (Spaced Repetition System) — Spaced review algorithm (e.g., SM-2). Studeia uses in flashcards and adaptive review.
SSO (Single Sign-On) — Single login for multiple applications. Studeia: SAML, OIDC (Enterprise plan).
Strike (tutor chat) — Infraction moderated by Supervisor Agent. 3 strikes (LOW/MEDIUM in 7 days) = quarantine.
Stripe — International payment provider. Studeia integrates Stripe (card) + Asaas (PIX/boleto Brazil).
StudentMisconception — Database model tracking student conceptual errors with lifecycle.
T
Tenant — Institution in multi-tenant architecture. Studeia: Tenant.id is mandatory filter in all queries.
TenantApiKey — Tenant's own LLM API keys (Anthropic, OpenAI, etc). AES-256-GCM encrypted in database.
Triple JSON-LD stack — Article + FAQPage + BreadcrumbList on same page. Generates +1.8x citations in LLMs vs Article-only.
U
User-agent (AI crawlers) — AI bot identifiers: GPTBot, OAI-SearchBot, ChatGPT-User (OpenAI), PerplexityBot, ClaudeBot, Claude-Web, anthropic-ai (Anthropic), Google-Extended, Bytespider.
V
Vercel AI SDK — Unified Node.js SDK for multiple LLM providers. Studeia uses in all agents.
VideoProvider — Live class provider. Studeia supports 4: BBB, Zoom, Teams, Google Meet (adapter pattern).
Voyage AI — Embeddings provider. Studeia uses voyage-3 (1024 dims) as primary.
W
WCAG 2.1 AA — Web Content Accessibility Guidelines AA level. Studeia compliance.
Webhook — HTTP callback for events. Studeia: webhooks for billing (Stripe/Asaas), video providers, automations.
White-label — Vendor-brand-free platform. Studeia offers via custom domain + total branding + Studeia brand removal (Enterprise).
X
xAPI — Experience API. Modern standard for learning tracking. Studeia roadmap.
XP (Experience Points) — Gamification points. Studeia: hierarchical config tenant→course.
Z
Zoom — Videoconferencing platform. Studeia integrates as video provider via Server-to-Server OAuth.